问题
选择题
While she _________ TV in the sitting room, the bell________.
A.watches, rings
B.is watching, rang
C.was watching, rang
D.watched, was ringing
答案
答案:C
While she _________ TV in the sitting room, the bell________.
A.watches, rings
B.is watching, rang
C.was watching, rang
D.watched, was ringing
答案:C