Not all memories are sweet. Some people spend all their lives trying to forget bad experiences.

    Now American researchers think they are close to developing a pill, {#blank#}1{#/blank#} will help people forget bad memories. The pill is designed {#blank#}2{#/blank#} (take) immediately after a frightening experience. They hope it might reduce, or {#blank#}3{#/blank#} (possible) erase (抹去) the effect of painful memories.

    In November, experts tested a drug on people in the U.S. and France. The drug stops the body from {#blank#}4{#/blank#} (release) chemicals that fix memories in the brain. So far, the research {#blank#}5{#/blank#} (suggest) that only the emotional effects of memories may be reduced, not that memories are wiped out. They are not sure to the degree people's memories are affected.

    The research has caused a great deal of {#blank#}6{#/blank#} (argue). Some think it is {#blank#}7{#/blank#} bad idea, while others support it. Supporters say it could lead to pills which prevent or treat soldiers' troubling memories after war. They say that there are many people who suffer from terrible memories. {#blank#}8{#/blank#}, those who are{#blank#}9{#/blank#} the research say that maybe the pills can change people's memories and changing memories is very {#blank#}10{#/blank#} (danger) because memories give us our identity.

    In Canada and the United States, people enjoy entertaining(请客) at home. They often invite friends over{#blank#}1{#/blank#} a meal, a party, or just for coffee and conversation.

    Here are the {#blank#}2{#/blank#} (kind) of things people say when they invite someone to their home: "Would you like to come over for dinner Saturday night?” "Hey, we{#blank#}3{#/blank#}(have) a party on Friday. Can you come?"

    {#blank#}4{#/blank#}(reply) to an invitation, either say thank you and accept, or say you're sorry and give an excuse: "Thanks, I'd love to. What time would you like me to come?" {#blank#}5{#/blank#}"Oh, sorry. I've tickets for a movie."

    Sometimes, {#blank#}6{#/blank#}, people use expressions that sound like invitations(邀请) but which are not real invitations. For example: "Please come over for a drink sometime." "Why not get together for a party sometime?" "Why don't you come over and see{#blank#}7{#/blank#}(we) sometime soon?"

    They are really just polite ways of {#blank#}8{#/blank#}(end) a conversation. They are not real invitations because they don't mention a specific(确定的) time or date. They just show that the person is trying to be{#blank#}9{#/blank#}(friend). To reply to expressions like these, people just say "Sure, that would be great!" or "OK. Yes, thanks."

    So next time when you hear what sounds like an invitation, listen {#blank#}10{#/blank#}(careful). Is it a real invitation or not?

    Two new satellites of BeiDou Navigation(导航) Satellite System (BDS) {#blank#}1{#/blank#} (send) into space on a Long March-3D carrier rocket from the Xichang Satellite Launch Center in Sichuan Province, China at 2:07 a.m. on November 19, 2018. The satellites entered a Medium Earth orbit{#blank#}2{#/blank#} (safe) more than three hours later and will work with 17 other BDS-3 satellites already in space. They are also the 42^nd and 43^rd{#blank#}3{#/blank#} (member) of the BDS satellite family.

    China launched these satellites with {#blank#}4{#/blank#} aim of providing navigation services for countries and regions which participate in the Belt and Road Proposal by the end of 2018. “This is a key step for BDS developing {#blank#}5{#/blank#} a Chinese experimental system to a regional and then a {#blank#}6{#/blank#} (globe) navigation system,” said Yang Changfeng, chief designer of the BeiDou system. The positioning {#blank#}7{#/blank#} (accurate) of the BDS-3 system has been improved to 2.5 meters to 5 meters, said Yang.

    {#blank#}8{#/blank#} (name) after the Chinese term for the Plough, the BeiDou system has been serving China for 18 years {#blank#}9{#/blank#} another six BDS-3 satellites will be put into the Medium Earth orbit from 2019 to 2020. The system is expected {#blank#}10{#/blank#} (provide) first-class services around the globe by the end of 2020.

    I recently became friends with a young man {#blank#}1{#/blank#} had just migrated to Australia to escape war in his homeland. He was unskilled and was finding life difficult as he was unemployed. I {#blank#}2{#/blank#} (work) for a company in Australia for more than ten years before I found a better job. I knew that the manager would be disappointed when I was leaving.

    The manager asked me to introduce someone who I thought could do the job just as well as me, so I took this opportunity {#blank#}3{#/blank#} (arrange) an interview for my new friend. However, in the end, he was not offered the job after the interview.

    Later, I asked the manager why my friend was turned {#blank#}4{#/blank#}. The manager thought that his English was not good enough for the position, but I suggested that my friend should be a {#blank#}5{#/blank#} (suit) choice for the company since I could train him. I believed that once {#blank#}6{#/blank#} (give) the time to learn, he could do the job. After a {#blank#}7{#/blank#} (week) training, he was employed and was happy with his position.

    I knew how the terrible war had forced him to leave his homeland and {#blank#}8{#/blank#} price he had paid for doing so. I appreciate {#blank#}9{#/blank#} (be) able to live in Australia and believe that this {#blank#}10{#/blank#} (appreciate) is best proved by offering acts of kindness to people in need of help.

For much of history, reading was a fairly noisy activity. Today, however, the majority of us bottle the words in our heads as if {#blank#}1{#/blank#}(sit) in a library.

Recent studies provide ample evidence {#blank#}2{#/blank#} the ancient art of reading aloud has a number of benefits, from helping improve our memories {#blank#}3{#/blank#}strengthening emotional bonds between people.

According to a research on the impacts of reading on memory, people consistently remember words and texts {#blank#}4{#/blank#}(well) if reading them aloud than if reading them silently. This phenomenon has been named the "production effect", which means that producing {#blank#}5{#/blank#}(write) words-namely, reading them out loud-improves our memory of them. Even just silently mouthing the words makes {#blank#}6{#/blank#} more memorable.

One reason why people remember the spoken words better is that it gives us {#blank#}7{#/blank#} additional basis for memory. We are {#blank#}8{#/blank#}(general) better at recalling events that require active involvement. For instance, producing a word in {#blank#}9{#/blank#}(respond) to a question makes it easier to remember.

In time when our interactions with others and the large amount of information we take in {#blank#}10{#/blank#}(be) all too transient (转瞬即逝的) , perhaps it is worth making bit more time for reading out loud.

{#blank#}1{#/blank#}success we must have a complete and thorough plan.