Not until did Humphrey begin working.
A. did it stop raining
B. had it stopped raining
C. it stopped raining
D. it stops raining
网友回答
A. did it stop raining
B. had it stopped raining
(答案→)C. it stopped raining
D. it stops raining
解析:
试题分析: Not until 结构位于句首时,主句用部分倒装语序,而从句语序不变,仍然是陈述语序,再根据动词did判断用一般过去时,故选C。句意:直到雨停了汉弗莱才开始工作。