单项选择题

The number of students in this college _________ this year.

A．have doubled
B．has doubled
C．have been doubled
D．has been doubled
<上一题 目录 下一题>
热门 试题

单项选择题
I've made _________ more mistakes than you have.
A．a lot
B．many
C．very
D．a lot of
相关试题