問題詳情
17. It seems obvious, when looking at a map, that the easternpart of Brazil ______ connected to Africa long ago whenthe earth was forming.
(A) must be
(B) must have been
(C) should have been
(D) might be
參考答案
答案：B
難度：適中0.427861
統計：A(33),B(172),C(68),D(74),E(0)
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