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—Are these seats available?
—Sorry, sir. The seats ________.
A.have reservedB.are reserved
C.reservedD.are reserving
B
B 考察动词的时态和语态。句意:—这些座位有人吗?—对不起,先生。它们已经被人预定了。Reserve和seat构成被动关系,应该使用一般现在时的被动语态,表示目前的一种状态。光顾B正确。
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