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What courses are you going to do next term?

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What courses are you going to do next term?
I don't know. But it's about time____on something.
A.I'd decide
B.I decided
C.I decide
D.I'm deciding
2.He was very busy yesterday,otherwise he ____to the meeting
A.would come
B.came
C.would have come
D had come
这题里would come和would have come分别用与什么情况?
1.B It's (about) time ...有两种用法:一是后面接that引导的从句,that 可省略,但注意此时从句用的是虚拟语气,表示“现在某人该做某事了”.含有该事早该去做而未做,现在去做似乎都为时已晚的意思;二是后面接动词不定式,It's (about) time (for sb)to do sth.
2.C 这是一个条件句,一般来说,主句用一般现在时,从句就应该用一般将来时,在这里,主句用的是一般过去时,那么从句也就应该用一般过去将来时,而根据句意,我们可以知道这里要用虚拟语气,然后要结合一下虚拟语气应该用的事态就可知道答案选C了.