2.到了收款台，我意识到把钱包落在家里了。

When I got to the check-out, I _________________________.

1.努力工作是打开成功之门的钥匙。

To work hard_______________________________________.

7.Though they failed many times, they carried on_______(work) hard.

6.Don’t put your new bike outside, or you _______(lose) it.

5.These armchairs mustn’t _______(take) out of the office, Tom.

4.It is better______(give) than______(receive).

3.He said they ______(fall)behind the other students if they didn’t study hard.

2.The population of the city______(be) nine million now.

I think it ______(be) more by the end of this year.

1.The student kept on ______(ask) his teacher some strange questions.

6. She was _________at the pleasing news. (please).

B)用所给动词的适当形式填空