题目内容
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 |
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
练习册系列答案
相关题目
题目内容
| A.did | B.is to be doing | C.were doing | D.be doing |