题目

Such animals as South China tigers are believed_______, for we’ve had no track of them for ages.

A

becoming extinct

B

to become extinct

C

to have been extinct

D

having been extinct

时态

本题考查时态和believe的用法

C选项,当believe为被动语态时,后面习惯接不定式。根据后半句“for we’ve had no track of them for ages”判断,时态应为现在完成时。extinct“绝种的,灭绝的”。综上,C选项正确。

A选项,与题意不符,故排除。

B选项,与题意不符,故排除。

D选项,与题意不符,故排除。

故正确答案为C 项。

多做几道

If you are entitled to sickness______, you must claim it from your employer.

A

budget

B

allowance

C

wage

D

income

Around two o’clock every night, Sue will start talking in her dream. It somewhat ________ us.

A

bothers

B

had bothered

C

would bother

D

bothered

It will be at least 10 days _______they finish cleaning up the typhoon-stricken village.

A

until

B

before

C

since

D

when

——What should we pay more attention to if we go camping in the mountains?

——Nothing special. Take a special pair of glasses _______ the wind there is strong and cold.

A

even if

B

in case

C

providing that

D

so long as

This crop has similar qualities to the previous one, _______ both wind resistant and adapted to the same type of soil.

A

being

B

been

C

to be

D

having been

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