1 At first i didn't know ____the computer on.

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1 At first i didn't know ____the computer on.
A)what to switch B)what to be switching
C)how to switch D)how to be switching
2 i heard my favourite play ____again on the radio a few years ago.
A)perform B) performed C)to performed D)to have performed
3 Don't mention it,i'm glad ____you.
A)to help B)to have helped C) helping D)having helped
4i will have to have my watched reparied____late again.
A)in order not be B) for not being
C)so as not to be D)so that it's not
5 Mr White is ____to need a doctor.
A)so sick B)as sick as C)too sick D)enough sick
6 Fish can't live on in ____water.
A)clam B) silent C) still D) stop

1.C我不知道怎样开机.因为后半部分不需要what所作的主语或宾语成分,而需要一个表示如何的how来做状语,所以排除A,B.另外,是人去主动开机,故不用D而选C
2.A hear watch feel 等感观动词后面加doing或者do.
hear作为行为动词听见时,hear sb do sth表示“听到某人做了某事”或“经常听到某人做某事”,hear sb doing sth.表示“听到某人正在做某事”
performing是现在正被放,这里没有体现,也没有.不选to do ,所以选A.
3.A be glad to do sth.乐意做某事,排除C,D.一般就算已经发生了,也不用have done的形式,故选A
4.D D选项“我要修我的表,以使它不再慢”.so that 表示目的,后面可以加句子
5D A选项应该改为so sick that he need a doctor.B选项“和什么一样虚弱”C选项翻译为“太虚弱以至于不需要医生” D选项“足够虚弱而需要看医生”
6D clam water 水蚌 silent water静静的水 stop water止水,不流动的水

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