问题
选择题
The phone had been ringing for three minutes before it .
A.answered
B.had answered
C.was answering
D.was answered
答案
答案:D
由主句的had been ringing判断,从句用过去时态,我们看出answer与it是被动关系。
The phone had been ringing for three minutes before it .
A.answered
B.had answered
C.was answering
D.was answered
答案:D
由主句的had been ringing判断,从句用过去时态,我们看出answer与it是被动关系。