_____________, the speaker began his speech. 选哪个
a.thestudentshavingtakentheirseats.b.havingtakentheirseats.c.thestudentshavetakenthei...
a. the students having taken their seats.
b. having taken their seats.
c.the students have taken their seats.
d.taking their seats. 展开
b. having taken their seats.
c.the students have taken their seats.
d.taking their seats. 展开
2个回答
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选b. 前面的动作要和后面的the speaker一致,而且动作有先后关系,所以前面要用完成时 后面用过去时
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