Thefirstuseofatomicweapon(原子弹)wasi

发布时间：2020-07-10 04:37:32

The first use of atomic weapon(原子弹)was in 1945, and their power _________ increased ever since．













A.is












B.was











C.has been











D.had been

网友回答

C解析本题考查动词的时态。ever since从那以后，指从1945以后到现在，所以句子应该用现在完成时态。
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