"The first use of atomic weapon(原子弹)was in 1945,and their po
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"The first use of atomic weapon(原子弹)was in 1945,and their power _________ inc"
"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"
"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"
答案C
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.
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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