"Open your exercise books and回答
A
the following," the teacher said.

A. put down

B. put on

C. put off

D. put up
出自:广东开放大学大学英语1(专,2021秋)

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块