问题

I was reading a novel_____ he was watchingTV
A:when
B:while
C:before
D:as
B:while
C:before
D:as
正确答案是:
同类题型
It is sby foreign cell phone producers.
Many people were_________by the film when it first came out
hat they are inexperienced, they havedone a good job
then, more than 2 billion apps have beendownloaded at prices ________ free to $900.
The 18th Jiangsu Provincial Games will ______ in September. Many students want to be volunteers.