According to one resident, they are short of sleep because ____________.
A、they are too tired to fall asleep

B、they are forbidden to sleep at work

C、they are kept by treating their patients

D、they are too worried about oversleeping
出自:四川民族学院大学英语A卷

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