We should keep the classroom and tidy.
A. clean B. cleaned C. cleaning D.to clean
I won’t make such a silly mistake again. I’ll be next time.
A. careful B. carefully
C. more careful D. more carefully
Sir, would you mind not here, please?
A.to smoke B. smoke C. smoking D. Smoked
Miss Green isn’t in the office. She to the library.
A. went B. was C. has gone D. has been
I didn’t hear your call because I to music at that time.
A. listen B. will listen
C.am listening D. was listening
---Must we get to the airport before 8 o’clock?
---No, you .The plane takes off at 12 o’clock.
A. mustn’t B. needn’t
C. wouldn’t D. shouldn’t
