3. 状语从句(5)

5. When _____ different cultures, we often pay attention only to the differences without noticing

the many similarities.（2006-浙江）

A. compared B. being compared

C. comparing D. having compared

6. Sugar, when ___ with water, dissolves quickly.（2005年-上海春）

A. mixed B. mixing

C. mix D. is mixed

7. When help, one often says “Thank you.” or “It’s kind of you.”（2005-福建）

A. offering B. to offer

C. to be offered D. offered

8. When first _____ to the market, these products enjoyed great success.（2004-全国Ⅱ）

A. introducing B. introduced

C. introduce D. being introduced

9. It shames me to say it, but I told a lie when ______ at the meeting by my boss（2004-全国Ⅳ）

A. questioning B. having questioned

C. questioned D. to be questioned

10. _______ with the size of the whole earth, the biggest ocean does not seem big at all.（2004-

湖北）

A. Compare B. When comparing

C. Comparing D. When compared

11. Generally speaking, ____ according to the directions, the drug has no side effect. [2003-上海]

A. when talking B. when taken

C. when to take D. when to be taken

12. Unless ______ to speak, you should remain silent at the conference. [2003-上海春]

A. invited B. inviting

C. being invited D. having invited

13. The research is so designed that once _____, nothing can be done to change it. [2002-全国]

A. begins B. having begun

C. beginning D. begun

14. Though ______ money, his parents managed to send him to university. [2002-上海]

A. lacked B. lacking of

C. lacking D. lacked in

15. When ______, the museum will be open to the public next year. [2002-上海春]

A. completed B. completing

C. being completed D. to be completed

16. Some of you may have finished Unit One. _____, you can go on to Unit Two. [2009-江西]

A. If you may B. If you do

C. If not D. If so

17. While building a tunnel through the mountain, ______. [2000-上海春]

A. an underground lake was discovered B. there was an underground lake discovered

C. an underground lake was discovered D. the workers discovered an underground lake

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