【课堂练习】
( )1.(2012年南平)Lady Gaga is famous ________ her beautiful voice.
A.as B.with C.for
( )2.(2012年厦门)—Jenny, will you still be here this afternoon?
—Yeah, I think I'll stay ________five.Then I'm leaving for dinner.
A.at B.since
C.until
( )3.(2012年白银)I think every student should go to school ________, but some of them are always late.
A.by the time B.on time
C.for a time D.at times
