问题描述:
The baby is the only person that ___(survive) the air crash.
答案填的是has survived.那填survived过去时不对吗,为什么要填完成时呢.
It can _____(believe)that there is no life on Mars.
为什么填be believed
答案填的是has survived.那填survived过去时不对吗,为什么要填完成时呢.
It can _____(believe)that there is no life on Mars.
为什么填be believed
问题解答:
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