20. Mr. Johnson suggested ____ before details are discussed.

10.

42. ____ may help us avoid some diseases.

5.

23. All computer systems contain hardware components for input, central processing unit and output, ____ how powerful they are.

58. 很抱歉发生了这样的事情。但我向您保证：我们会尽一切努力使您的损失减少到最低限度。

19. Not only ____ about the food, she also refused to pay for it.

21. Few people ____ applied for the position meet the requirements of the company.

2.

9.

4.

( )12. When the man came back, he found the roof of his car had been damaged by an elephant.12.【解析】题意：当这个人回来时，他发现他的车顶被一头大象弄坏了。根据短文第三句 “When he came back, its roof was badly damaged.” 可知，当他回来时，车顶被严重损坏了。本题说法正确，故答案为A。