— I am worried I can't get into a good high school because I'm weak ______ English. 

— Don't worry. ______ and asking a teacher for help can help a lot. [ ]

A. in; Work hard

B. in; Working hard

C. at; Working hard

D. at; To work hard

男性成年患者，烧伤面积80%，均为Ⅲ度烧伤，创面处理应选择哪种方法为宜（）。

A.有计划分期切痂植皮

B.局部应用中草药

C.一次性切痂植皮

D.自然脱痂植皮

E.磺胺嘧啶银冷霜保痂