-- A medical team was sent to Japan by air five hours ago.
---So they_____ have arrived by now. The flight usually takes four hours or so.
A.mightB.couldC.needD.must
D

試題分析:句意:一個醫(yī)療隊在5個小時前已經(jīng)派往日本。所以他們到現(xiàn)在為止肯定已經(jīng)達(dá)到了,航班通常是花費4個小時的。must have done肯定已經(jīng)做了某事,表示對過去的肯定推測。故選D
點評:情態(tài)動詞是中考的熱點,情態(tài)動詞除了表推測外,還可以表達(dá)另外的意思,如must理解為必須,由這個詞所開頭的問句,肯定回答用Yes,you must.否定回答用No,you needn’t或者是No,you don’t have to.注意不用mustn’t,因為mustn’t表示例行禁止的含義。
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