听力原文：W: Why don't you go to bed, Bob? You look so tireD.
M: I have to finish this assignment first. It's giving me a hard timE.
Q: Why is Bob late?
(17)
A.He can't sleep.
B.He doesn't know the timE.
C.He has to finish his homework.
D.He doesn't want to sleep.

A.M:
B.
Q:
C.He
D.
B.He
E.
C.He
F.
D.He

【参考答案】

C
解析：assignment 与 homework同义。