高一英语1.The first use of atomic weapons was in 1945 ,and their

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高一英语
1.The first use of atomic weapons was in 1945 ,and their power__increased greatiy ever since.
A.is B.was C.has been D.had been
2.Does it___any difference whether we leave at 9:00 or 10:00?
A.tell B.have C.give D.make
3.The old worker insisted that he___old and____back to the working post again.
A.wasn't;be sent B.wasn't;was sent C.be not;sent D.isn't;sent
请对每个选项进行分析

1.C
因为有ever since从那时(即1945年)起,所以用现在完成时
2.D
make a difference意为“有关系,有影响,起作用”
3.A
第一个空表示“坚持认为”,所以和主句时态一致,用过去时
第二个空表示“坚持要做”,所以要用虚拟语气,即(should) be sent,而should可以省略

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