—Could I go to the movies tonight?

—No, you _____.You have to finish your homework first.[ ]

A. don't

B. can't

C. needn't

D. couldn't

既有解热镇痛、抗炎、抗风湿作用还可以抑制血小板凝聚防血栓（）

A.

B.

C.

D.

E.