作者tw00176060 (Andy)
看板Eng-Class
標題[文法] 一題文法題^^
時間Tue May 4 19:04:40 2010
Our ancestors ___ remarkable people to have lived with such harships.
(A) could have been
(B) must have been
(C) should be
(D) will be
答案:(B)
請問為何其他三個答案不能選?
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