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
网友回答
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。