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1.---Have you traveled to any foreign countries so far?

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1.---Have you traveled to any foreign countries so far?
---___________,but I have a plan for it.
A.Ever since B.Not yet C.Later on D.From then on
2.It's your turn _________ the blackboard.
A.for clean B.to clean C.cleaning D.cleans
3.My mother _______ a soldier for three days.
A.has become B.has been in C.became D.has been
4.----Have you done your work______,Jim?
----Yes,I 've done it_______.
A.already;already B.already;yet
C.yet;already D.yet;yet
1.---Have you traveled to any foreign countries so far?
第一道B 问句是完成时 回答not yet 是完成时的否定 故选择B
第二道B 不定式(不知道是不是这个知识点,或者是固定的be one's turn to do sth)
第三道D been 是延续性动词,其他的都是暂短性动词 不能用于完成时的句子
这里只能用延续性动词,因为后面有“for three days”
第四道C 基础知识点 没什么好说