_____.I must be leaving now.

______ you will close all the windows and doors .

A.To make sure

B Make sure

C.Being made sure

D.Making sure.

下列哪种药物能吸收空气中二氧化碳，析出沉淀（）

A.诺氟沙星

B.氧氟沙星

C.磺胺甲噁唑

D.甲氧苄啶

E.异烟肼