问题补充:
Don’t put off today’s work till tomorrow. I mean, today’s work today.
A. may do
B. must do
C. may be done
D. must be done
答案:
A. may do
B. must do
C. may be done
D. must be done
解析:考查情态动词。句意 不要把今天的工作推到明天,我的意思是,今天的工作必须今天做完,must 表示必须,工作被做,用被动语态。所以选D项。