Question

【题目】The volunteers many signs to remind people to protect the environment.

A. put on B. put up C. put down D. put off

Answer 1

【答案】B

【解析】

试题分析：句意：志愿者们挂起许多标志提醒人们保护环境。A. put on把……放在……上面；穿上；B. put up挂起，张贴，举起，抬起；C. put down放下；D. put off推迟，拖延。根据句意，这里是“挂起标志”，故选B。