【題目】Judging from his worried face, we knew that he ______ have had some trouble.

A. wouldB. willC. needD. must

【答案】D

【目的】

【解析】句意：從他焦慮的表情上判斷，我們知道他一定已經(jīng)遇到一些麻煩了。考查情態(tài)動詞的用法。must + have +過去分詞表示對過去事實的肯定推測，根據(jù)主句謂語動詞knew判斷是過去事實。故選D。

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