Don't ________ careless in class.
A. being
B. to be
C. be
D. been
下面那些句子是祈使句?
A. He has come here.
B. Don't be late tomorrow.
Come here.
D. Sitting down.
下面正确的是______.
A. Let go, will you?
B. No smoking!
C. Don't reading.
D. No talking in class.
Don't ________.
A. carefully
B. be careful
C. careful
D. cheat others.