_____ while the iron is hot.
A. Beat B. Strike C. Hit D. Striking
b选B。
b
d
D. WHILE 一般跟动名词联用
Strike. 这是Proverb谚语，没得商量。
另外：
while常与现在分词连用，做时间状语。如：
Iwas doing homework while my dad was watching TV.
Don't laugh while someone is talking.
Don't talk while eating.
While也可连接让步状语：
While he likes meat, I like vegetables.
这句Strike的用法与Don't talk whileeating.相似，while做时间状语，而前面是祈使句，故要选strike。
B
