1.He seems____abroad next month.A.to learn B.to have learn C.to be learning D.to have been learning2.In those days,almost nobody believed that a feather and a stone____a the same speed.A.fall B.can fall C.fell D.falls请问答案是什么？麻烦说出原因！
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The answer are C and A.
热心网友
1.C seem to do 是固定用法，“好象。。。” ；现在进行时表示将来。所以用seems to be learning.2.A 主句虽然是过去时态，但从句里的内容是“事实”所以用现在时态，主语是复数（a feather and a stone)，所以用A不用D.
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1A2A
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1A 不定式表将来时2A 虚拟语气 表状态
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D A
热心网友
1. A 动词不定式有表示将来的意思.本句中有next month所以要用将来时. 2. A 虚拟语气.省略了would