In our class some students are too shy to our hands when the teachers ask us to answer questions.
A. put on
B. put down
C. put out
D. put up
网友回答
A. put on
B. put down
C. put out
(答案→)D. put up
解析：此题重点考查有关动词put的固定短语的含义及用法。Put on 表示穿上；put down表示放下；put out表示扑灭；put up表示挂起，举起。根据语境可知选择D。