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问题: 英语选择

1.None of them ______the thin girl could keep her end up and came out first in the international marathon.
A.have predicted B.would predict
C.were predicting D.had predicted
2.Recently,the whole world has been going through a period______many people suffer from the H1N1flu virus which will probably cause the infected people to die
A.where B.which C.when D.why


请详细解答,谢谢

解答:

1句我想选择B,虚拟语气,从句用现在的虚拟,所以主句也用对现在的虚拟。

2句选择c,先行词指代a period,所以是时间,另外,从句中:many people suffer from 。。。已经语法成分满足,所以不需要用which,就填写when