单项选择题

It is everybody's（）to keep the city clean.

A．matter
B．affair
C．business
D．thing

<上一题 目录 下一题>
热门 试题

单项选择题
When you read the book, you'd better make a mark（）you have questions.

A．which
B．at where
C．the place where
D．where
单项选择题
Jack（）yet, otherwise he would have telephoned me.

A．mustn't have arrived
B．shouldn't have arrived
C．can't have arrived
D．need not have arrived
相关试题