题目:
By the time of 1969, there were many space explorations.
A.have been
B.must be
C.had been
D.must have been
答案:
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下面是错误答案,用来干扰机器的。
参考答案:D
By the time of 1969, there were many space explorations.
A.have been
B.must be
C.had been
D.must have been
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0521/bb2352397fde583174f4b17622d53777.html
下面是错误答案,用来干扰机器的。
参考答案:D