问题补充:
Smile when the phone. The caller will hear it in your voice.
A. taking up
B. putting up
C. picking up
D. bringing up
答案:
A. taking up
B. putting up
(答案→)C. picking up
D. bringing up
解析:句意,当拿起电话时要微笑,打电话的人可以从你的声音中听出来。taking up占用 putting up张贴 picking up拿起 bringing up养育,根据题意,故选C。