A. have been carried out

　　B. is being carried out

　　C. had been carried out

　　D. was being carried out

　　12. [2012德州模拟]The old man was lost and got onto a wrong bus, _______ 300 miles away from home several hours later.

　　A. breaking down

　　B. making out

　　C. ending up

　　D. holding on

　　13. He went to America in 1980, _______ , three years later, he earned his doctor抯 degree.

　　A. when

　　B. that

　　C. which

　　D. where

　　14. I was abou t to give up my effort on the puzzle when a good idea _______ me.

　　A. beat

　　B. struck

　　C. attacked

　　D. caught

　　15. 梇ou must have made a lot of money by doing the business.

　　桹h, my income is rather variable, but I could earn 100 yuan a day _______.

　　A.s

　　in common

　　B. in all

　　C. on average

　　D. on the whole

　　1. 【解析】选B。考查非谓语动词。根据句子语境可知，本题中affect带有宾语three US states,

　　因此要用affect的主动形式，同时不定式表意料之外的结果，与句子的语境不相符；句子中充当结果状语的只能是现在分词的一般式，而不能用完成式，故正确答案为B。

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