蝉蜕除疏散风热外，又能（）
A.疏肝
B.止痉
C.升阳
D.解毒
E.润肺
参考答案：B
Everyone should do something _____ wild animals. [ ]
A. to protect
B. protecting
C. protect
D. to protecting
The professor walked onto the platform and seated himself in a chair, ____ for answering questions.
A．had prepared
B．being prepared
C．preparing
D．prepared
