单项选择题

We are busy ______ our lessons these days.

A．prepare
B．preparing
C．to prepare
<上一题 目录 下一题>
热门 试题

单项选择题
Did you ______ the football match last night
A．see
B．watch
C．look
单项选择题
John has two brothers. One is an artist, ______ is a scientist.
A．the others
B．the other
C．another
相关试题