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问题 选择题

下列实验操作正确的是                                                                       [ ]

A．熄灭酒精灯      

B．闻气体气味      

C．倾倒液体         

D．稀释浓硫酸   

答案

B

选择题

I'll show you _____________ home.[ ]

A. your

B. my
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选择题
Mr. Smith teaches ________ science. We all like ________classes very much.
A．us, hisB．our, heC．our, himD．us, him
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