问题
选择题
He seemed as if he ___ his homework when his mother came in.
A．did
B．is to be doing
C．were doing
D．be doing
答案
答案：C
这是以as if引导的条件状语从句,一般要用虚拟语气.这是与现在事实相反.所以选C
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He seemed as if he ___ his homework when his mother came in.
A．did
B．is to be doing
C．were doing
D．be doing
答案：C
这是以as if引导的条件状语从句,一般要用虚拟语气.这是与现在事实相反.所以选C