问题

Nowadays people are convinced _ the negative effect of second-hand smoking _ people around.

A:of at
B:by in
C:of on
D:on at

正确答案是：

同类题型

summer, milk quickly turns sour itis refrigerated.

下面对于中国文学名篇的解说，不正确的一项是（）

Little Jim should love _______ to the theatre this evening

Mary ________ as a secretary in this company for twenty years and now she stays at home taking care of her own garden

How many of us ____ a meeting that has nothing to dowith us is not important at all