------I’d like to book a round- trip ticket.------Sorry, sir, but there are no t

题干

------I’d like to book a round- trip ticket.
------Sorry, sir, but there are no tickets______ at the moment.

A．available

B．usable

C．suitable

D．comfortable

上一题下一题 0.64难度单项选择更新时间:2012-07-10 08:09:31

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