Iwasabouttoleavemyhousethetele

I was about to leave my house______ the telephone rang.

A．while

B．as

C．when

D．and

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第一部分语言知识运用
第一节单项填空（共15小题，每小题1分，满分15分）
21．We work together to achieve our common purpose： world that is safer cleaner and healthier than one we found．

A．the；the

B．a；不填

C．a；the

D．the；不填

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35．Such a great event __________ that it will attract governments and people from across the world to Shanghai．

A．is World Expo 2010	B．World Expo 2010 is
C．has World Expo 2010 been	D．World Expo 2010 has been

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34．________spending our vacation in the city，why not try hiking in the courtry?

A．Instead of

B．In favour of

C．In case of

D．In terms of

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33．— We should recycle everything we can．
— Absolutely．These may seem little things，but they’re not__________it comes to saving the
environment．

A．since

B．when

C．while

D．As

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32．No ready technical data was ______________，but we managed to go without．

A．believable

B．convenient

C．available

D．Accessible

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