Ⅱ. 用所给词的适当形式填空
【小题1】What should we pay attention to while __________ (eat)?
【小题2】I was so __________ (comfort) and warm in bed that I didn’t want to get up.
【小题3】It’s not __________ (impolite) to talk with your mouth full.
【小题4】It’s important to exercise __________ (regular).\
【小题5】Parents should teach their children to behave __________ (proper) in public.