Question

While I _______ TV in the sitting room, the bell _______.

A．watches, rings	B．watched, rang
C．was watching, rang	D．watched, was ringing

Answer 1

C解析:
while引導(dǎo)的時(shí)間狀語從句，一般情況要用進(jìn)行時(shí)態(tài)。