Wouldn’t it be for you to pick me up at four o’clock and take me to the airport.A. freeB.

问题补充：

Wouldn’t it be for you to pick me up at four o’clock and take me to the airport.

A. free

B. vacant

C. handy

D. convenient

答案：

A. free

B. vacant

C. handy

(答案→)D. convenient

解析：free自由的，空闲的；vacant空缺的，空白的；handy便于使用的, 便利的, 可携带的, 轻便的；convenient方便的，D项符合题意。