In Canada and the United States, people invite friends over for a meal, a party or just for coffee and conversation.

    Here are kinds of things people say when they invite someone to their homes:

    "Would you like{#blank#}1{#/blank#}(come) over for dinner this Saturday night?" "Hey. We {#blank#}2{#/blank#}(have) a party on Friday. Can you come?"

    To reply to an invitation(邀请), either say thank you and accept, or say you're sorry and give {#blank#}3{#/blank#} excuse. "Thanks, I'd love to. What time would you like me to come?" or "Oh, sorry. I have a ticke{#blank#}4{#/blank#}a movie."

    Sometimes, however, people use words {#blank#}5{#/blank#} sound like invitations 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 us sometime soon?"

    They are really just polite ways of {#blank#}6{#/blank#}(end) a conversation. They are not real invitations because they don't mention(提到；谈到) a certain time or date. They just show that the person is trying to be{#blank#}7{#/blank#}(friend). To reply to {#blank#}8{#/blank#}(expression) like these, people just say "Sure, that would be great!” or "OK. Yes, thanks."

    So next time when you hear such sounds like an invitation, listen{#blank#}9{#/blank#}(careful). Is it a real invitation {#blank#}10{#/blank#} is the person just being polite?

    Teenagers have long been told that being active and {#blank#}1{#/blank#}(take) part in sports is good for their health. But new research suggests that too much sport for teenagers could negatively affect their well-being just as much as too {#blank#}2{#/blank#} sport.

    The US Department of Health and Human Services suggests that young people {#blank#}3{#/blank#}(age) between 6 and 17 work{#blank#}4{#/blank#}at least 60 minutes a day, 7 hours a week. But researchers from Switzerland say their study suggests that 14 hours of physical activity a week is best for promoting good health in teenagers. However, more than 14 hours {#blank#}5{#/blank#} (appear) to be harmful to their health. To reach their findings, they had 1,245 teenagers {#blank#}6{#/blank#}(survey) in their research.

    All participants (参与者) were required to answer questions about height and weight, sports practice, sports {#blank#}7{#/blank#} (injure) and well-being. Their well-being was measured using the Word Health Organization (WHO) Well-being Index, {#blank#}8{#/blank#} provides scores between 0 and 25. Of the participants, 50.4% were male. Almost 9% of these males were overweight. The overall {#blank#}9{#/blank#}well-being score for all participants was 17.

    The researchers divided sports participants into low, average, {#blank#}10{#/blank#}, and very high. The researchers found that participation in the low and very high activity groups were more likely {#blank#}11{#/blank#} (have) well-being scores below 13, compared with participants in the average group. The researchers found that the highest well-being scores were {#blank#}12{#/blank#} a by participants who carried out around 14 hours of physical activity a week, but beyond 14 hours resulted {#blank#}13{#/blank#} lower well-being scores.

    The researchers suggest that doctors {#blank#}14{#/blank#} care for teenagers should check their level of sports practice. Teenagers {#blank#}15{#/blank#} (probable) need a supportive and closer follow-up of their health and well-being.

    Mr.Brown was tired of living in the big city {#blank#}1{#/blank#} he worked. He wanted to move to the country and live in a house from which he could get to his office in the city early every day. He {#blank#}2{#/blank#} (look) for a house when he saw an advertisement in a newspaper one day. The advertisement said that a suitable house in a quiet area was up for sale {#blank#}3{#/blank#} a reasonable price, and the house was within a stone's throw of a railway station from which there were frequent {#blank#}4{#/blank#} (train) to the big city.

    "That's exactly {#blank#}5{#/blank#} I need," Mr. Brown said to {#blank#}6{#/blank#} (him). So he called the housing agency and arranged to go by train the next day {#blank#}7{#/blank#} (have) a look at the house.

    The housing agent met him at the station and they started walking. It took them at least 15 minutes to get to the house. When they finally arrived, Mr. Brown said {#blank#}8{#/blank#} (angry), "I should be very {#blank#}9{#/blank#} (interest) to meet the man who threw the stone you mentioned in {#blank#}10{#/blank#} newspaper."