一．单选题（15分）
( )1. I feel English is _______ science subject. I hope our English teachers can help me to get this problem.
A. less difficult than B. more difficult than
C. no easier than D. so difficult as
( )2. –What time do you expect(期望) me back, Mum?
-Say, _______ half an hour.
A. at B. before C. for D. in
( )3. –Mike has gone to Xiamen for a visit.
-How great. But do you know when he _________?
A. lef t B. has left C. was leaving D. had left
