1 . _________she was in Paris, she associated with many distinguished artists. （用适当的词填空）

2 . 当我在美国时，在你的帮助下，我过得很愉快。(while doing sth.--状语从句的省略)
________________, I had a good time with your help.

3 . —Well, thank you. You're a good friend, and you've changed my life.
—You're welcome. Hey,         you are making some real money, you can take your friend out for a nice thank-you dinner.

A．now that

B．unless

C．as though

D．while

4 . Tim was happy to take on all the housework ________ his wife went out to work.

A．while

B．until

C．before

D．since

5 . ________walking my dog in the street, I met an old friend of mine. (用适当的词填空)

6 . You'd better not send or receive text messages         you are crossing a street or highway.

A．before

B．after

C．while

D．until

7 . Tired __________ he was, he still went on with his work.

A．although

B．if

C．as

D．while

8 . Keep an eye on my suitcase _____I buy my ticket. (用适当的词填空)

9 . 在等公交车的时候,我捡到了一个钱包。
____________ the bus, I picked up a wallet.

10 . 待在农村时，他交了几个好朋友。（while doing…）(汉译英)