1. (2016·无锡) 用括号内所给动词的适当形式填空，并将答案写在答题卡对应题号的横线上。

1. （1） When night came, they put up a tent (keep) warm.
3. （2） Mary (talk) on the phone, so I just nodded to her and went away.
5. （3） —It is said that a space station (build) on the moon.

   —How amazing! But it may take a long time,I guess.

7. （4） France is a beautiful country and (cover) an area of over 260,000 square miles.
9. （5） As soon as he (offer) a well-paid job, he called his parents to tell them the good news.
11. （6） —Hi, Judy. Have you graduated from college?

    —Yes, I (study) in Nanjing University for four years.

13. （7） The engineer (try) every possible way, but still cannot get the computer started.
15. （8） You can't imagine what difficulty I had (express) myself clearly at the beginning.