Question

【题目】______ when the visitor comes in.
A. Raise to your feet
B.Rise to your feet
C.Rising to your feet
D.Raising your feet

Answer 1

【答案】B
【解析】表达站起来，起身，只能用rise to one’s feet；分析句子结构，when连词引导时间状语从句，没有主句，根据句意，只可能采用祈使句；句意：来宾进来时请大家站起来。根据句意，故选B。