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The plane ___at 7:00 pm ,so I have to ve at the airport by .

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The plane ___at 7:00 pm ,so I have to ve at the airport by .
A has left B is to leave C will have left D leaves
Many houses ___for teachers since last year
A are building B built C have built D have been built
That's a nice watch@ Is it ___in China?
A make B making C made D makes
The plane ___at 7:00 pm ,so I have to ve at the airport by .
D 计划好的或者一定会发生的动作,可以用一般现在时代替将来时.
D 房子是被修建的,所以用被动语态be done形式,since是完成时的标志,合起来就是have been done形式.
C 手表是被制作,所以是被动语态be made,只不过这里是问句,be动词提前了.