Question

-- 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．might

B．could

C．need

D．must

Answer 1

D

試題分析：句意：一個(gè)醫(yī)療隊(duì)在5個(gè)小時(shí)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(fèi)4個(gè)小時(shí)的。must have done肯定已經(jīng)做了某事，表示對(duì)過去的肯定推測。故選D
點(diǎn)評(píng)：情態(tài)動(dòng)詞是中考的熱點(diǎn)，情態(tài)動(dòng)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(gè)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?yàn)閙ustn’t表示例行禁止的含義。