1 . You can’t imagine that a gentleman ________ so rudely to an old lady.

A．shall have behaved	B．should have behaved
C．could have behaved	D．might have behaved

2 . 他本来可以靠捕猎为生，但是政府再也不允许杀害野生动物了。(把句子补充完整)
He ______________ by hunting, but the government won’t allow ________   wild animals anymore.

3 . You made a mistake again, you ________________more careful.
你又犯错了，你本能更仔细些的。

4 . The horrific tragedy __________ if the architect __________ more careful with the way buildings were constructed.

A．ought to be avoided; was going to be	B．could have been avoided; had been
C．may have avoided; has been	D．will be avoided; will have been

5 . I don’t know why she didn’t ask me how to do it as I __________her.

A．could have helped	B．might help
C．should have helped	D．could help

6 . Only blindness could have __________ (prevent) her from knowing that she was unusually attractive.（所给词的适当形式填空）

7 . Harry ________ have won the physics competition easily yesterday, but he gave up.

A．could

B．might

C．would

D．must

8 . 他花钱买了座位，但他本来可以免费进去的。
He paid for a seat, but he ________.

9 . 谣言说，目击者在事故现场进行实况转播，这原本能给警方提供有力证词，但一些网民借题发挥，使得民众难以区分偏见与事实。(it) （汉译英）

10 . ——啊！我刚好错过了回家的最后一班公共汽车。
——那确实很糟糕。我相信你本可以赶上的，但是你没有抓紧时间。
——Oh! I just missed the last bus back home.
——That’s really bad. I’m sure you _________ it, but you just didn’t hurry up.