481.Teenagers _________ their health because they play computer games too much.
A.have damaged
B.are damging
C.damaged
D.will damage
482.It was really very kind of you to give me a lift home.
Oh,don't mention it.I _______ past your house anyway.
A.was coming
B.will come
C.had come
D.have come
481.答案是B;根据下文从句的时态，得知动作正在进行。
482.答案是A;由上文的时态暗示得出结论，选A。
