摘要：1335] My sister here by now, for she took the early train. [译文] 我姐姐现在理应该到了.她赶的早班火车. A. could have arrived B. must have arrived C. ought to arrive D. ought to have arrived [答案及简析] D. 情态动词加上完成时态.表示对过去的推测.

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