问题
选择题
25．He left for lunch________ the clock_________ twelve．
A．while; hit
B．immediately; struck
C．right away; beat
D．at once; knocked
答案
答案：B
immediately在此用作从属连词，引导时间状语，相当于as soon as。Hit强调“击中”；beat指连续的打击、敲击；strike表示“敲打、撞击”；knock为“敲击”是不及物动词。