— I'm afraid I have to give it up.?

— Remember ______ sticks to his work will succeed one day?[ ]

A. who  

B. whom    

C. whoever    

D. no matter who?

关闭门窗灭蟑螂理由是（）

A.防药物流失

B.防蟑螂进入

C.防蟑螂外逃

D.防污染周围空气