What （ ） in your country in the last few years?A happens B happenedC has happenedD had happened我知道答案是C,请问是不是What是主语,所以要用单数.如果是其他的疑问词做主语,比如How,What,Which.等等,是不是也都是

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What （ ） in your country in the last few years?A happens B happenedC has happenedD had happened我知道答案是C,请问是不是What是主语,所以要用单数.如果是其他的疑问词做主语,比如How,What,Which.等等,是不是也都是

What （ ） in your country in the last few years?A happens B happenedC has happenedD had happened我知道答案是C,请问是不是What是主语,所以要用单数.如果是其他的疑问词做主语,比如How,What,Which.等等,是不是也都是
What （ ） in your country in the last few years?
A happens
B happened
C has happened
D had happened
我知道答案是C,请问是不是What是主语,所以要用单数.
如果是其他的疑问词做主语,比如How,What,Which.等等,是不是也都是作为第三人称单数啊

What （ ） in your country in the last few years?A happens B happenedC has happenedD had happened我知道答案是C,请问是不是What是主语,所以要用单数.如果是其他的疑问词做主语,比如How,What,Which.等等,是不是也都是
嗯,选C
这个地方,因为前面说了又in the last few years,只要有这样的结构就用现在完成时.
另外呢,针对你说what which等,单独成句的时候是用单数,但是how是不能当主语的,它是副词,引导状语从句.
这个题是考的时态和单复.
这是我第二次回答你的问题咯.

看到in the last few years就要用现在完成时时态
很明显用单数 你想的是对的

这句里what是主语，但是how是不能当主语的，它是副词，是引导方式的。而且这句考的是时态，不是单复数，has hapened 是现在完成时，所以才选这个的。

C has happened因 in the last few years要与现在完成时连用。从时态可选C。 你说的是对的。

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