--Please sit down. --______.
–Smoking should in school.--I agree. It’s bad for our health.
The boy asked his father .
Would you mind me how this math problem ?
–I think Mr Zhang may be in his office.--No, he be there. I saw him just now.A. needn’t, left B. mustn’t, leavingC. can’t, leave C. shouldn’t, leave
–Happy Teachers’ Day! Here are some flowers for you.-- beautiful flowers they are! Thank you!