—Are these seats available?—Sorry, sir. The seats .A. have reservedB. are reservedC. reser

网友回答

A. have reserved
(答案→)B. are reserved
C. reserved
D. are reserving
解析：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。