—Are these seats available?
—Sorry, sir. The seats ________.
A．have reservedB．a(chǎn)re reserved
C．reservedD．a(chǎn)re reserving
B
B 考察動(dòng)詞的時(shí)態(tài)和語(yǔ)態(tài)。句意：—這些座位有人嗎？—對(duì)不起，先生。它們已經(jīng)被人預(yù)定了。Reserve和seat構(gòu)成被動(dòng)關(guān)系，應(yīng)該使用一般現(xiàn)在時(shí)的被動(dòng)語(yǔ)態(tài)，表示目前的一種狀態(tài)。光顧B正確。
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