单项选择题

Great changes（）in our country these few years.

A、 have been taken place
B、 has taken place
C、 has been taken place
D、 have taken place

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单项选择题
If I had known who he was, I（）him that wrong code.

A、 would not give
B、 have given
C、 had given
D、 would not have given
单项选择题
The majority of men there earn their living by manual（）

A、 labour
B、 effort
C、 toil
D、 work
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