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1:Who is ______starting the bush fire

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1:Who is ______starting the bush fire
A blame
B to blame for
C blamed
D blame for
2:In warm weather ,fruit and meat_____long.
A:don't keep
B:can't be kept
C:are not kept
D:are not keeping
3:After Ihad walked for six hours_____
A:I had been tired out
B:I was tired out
C:I'll be tired out
D:I would have been tired out
4:____Mr.Chen is waiting outside to speak to you.He appears to be quite______important person.
A:/;an
B:A;an
C:The;the
D.The;/
5:Goodbye!I'm glad _____you.
_____,too!
A.to see; I
B to habe seen; Me
C to see;Me
D seeing;I
这5个小题的答案是:
BABBB
但是能不能讲解一下为什么这样选择?
1:Who is ______starting the bush fire
1.be to blame某人该受责备
2.在这里keep是系动词,没有被动语态
直接说keep long
3.was tired表示状态
再用had been 和上问重复
4.人名前加a表示不确定的某人,表示“一个叫...的人”
a important=a important person
5.to have done表示已经发生过的事情
to do表示没有发生,用于初次见面谈话之前