单项选择题

Many teakettles whistle when the （）starts to boil.

A. containing water inside
B. water contained inside
C. water containing inside
D. contain water

<上一题 目录 下一题>
热门 试题

单项选择题
More has been learned since 1945 about the chemical changes in the body than in all human history before（）time.

A. in
B. that
C. which
D. the
单项选择题
Don't smoke in the meeting-room, （）

A. do you
B. will you
C. can you
D. could you
相关试题