25．He left for lunch the clock twelve．
A. while; hit
B. immediately; struck
C. right away; beat
D. at once; knocked
网友回答
A. while; hit
(答案→)B. immediately; struck
C. right away; beat
D. at once; knocked
解析：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。