赞题库-背景图

单项选择题

The workers are busy ______ the house.

A．to build
B．built
C．building

<上一题目录下一题>

热门试题

单项选择题It's time to play games, ______ your sports shoes, please.

A．Put away
B．Put on
C．Put up

单项选择题—What ______ is Jim's shirt—It's green.

A．time
B．number
C．colour