I need one more stamp before my collection____A is completed Bhas been completed ,及原因thank you

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I need one more stamp before my collection____A is completed Bhas been completed ,及原因thank you
I need one more stamp before my collection____A is completed Bhas been completed ,及原因
thank you

I need one more stamp before my collection____A is completed Bhas been completed ,及原因thank you
A
像这种题目一般都是用一般现在时(而不是现在完成时)表示将来时.给你一个例子:
He will come to see you as soon as he filishes his homework.
说这句话时,他并没有完成家庭作业,也就是说动作是将来发生,但是这里要用一般现在时来表示.
所以,这里用的是filishes(一般现在时)而不是will filish(将来时).

选A
我的想法是现在还没有收集完成,那么完成的时候就是将来,所以B的完成时不对~
P.S 语法真的不好怎么解释~ 呵呵~

a