Keep clear（）the buoy.
A.to
B.on
C.of
D.for
参考答案：C
Lily good food on her holiday. [ ]
A. eats
B. ate
C. eating
沉香治疗痰饮喘咳，上盛下虚之证，其功效是（）。
A.温肺化饮
B.燥湿化痰
C.温肾纳气
D.益气健脾
E.补益肺肾
