How is the weather _____ December? [ ]
A. in
B. on
C. at
答案:A
I asked Jerry and Ken to come to my house for study, but ______ of them came. [ ]
A. none
B. either
C. neither
D. both
旅游者在旅游活动中不得有下列哪些行为?()
A、扰乱航空器、车船或者其他公共交通工具秩序
B、破坏公共环境卫生、公共设施
C、不尊重旅游目的地社会风俗、民族生活习惯
D、损毁、破坏文物古迹