Alice fell for a long time, and then she found {#blank#}1{#/blank#}  (she) alone in a long, low hall.

Some people think that wolves are dangerous to {#blank#}2{#/blank#} (human).

The exam is much  {#blank#}3{#/blank#} (easy) than we expected. Great!

We should use our pocket money {#blank#}4{#/blank#}   (wise).

Neil Armstrong is the first man to walk on the Moon. It was brave of him to go to a place that was {#blank#}5{#/blank#}   (know) to people at that time.

—Last week.

    What will the car be {#blank#}1{#/blank#}in the future? Maybe we can sit in a car {#blank#}2{#/blank#}can drive itself.

    About 40 years ago, scientists from the United States started to develop self-driving cars（无人驾驶汽车）. The {#blank#}3{#/blank#}（famous） recent one was made {#blank#}4{#/blank#}Google in 2009.There are cameras and radars（雷达） on the top of the car. They allow the computer in the car {#blank#}5{#/blank#}（draw） a 3D map of the environment. Chinese scientists have also {#blank#}6{#/blank#}（success） developed a self-driving car. The car made a t trip from Changsha to Wuhan.

    Is a self-driving car {#blank#}7{#/blank#}（safety）? Yes, a recent study shows that robots make less dangerous drivers than {#blank#}8{#/blank#}（human）. If only 10%of cars on the street are self-driving, 1, 000 people will be saved every year. If 90%of vehicles（交通工具） are self-driving, they will save 21, 700 people a year. {#blank#}9{#/blank#}, a self-driving car is expensive and each costs about $100, 000.So {#blank#}10{#/blank#}is impossible to be very popular in the near future.