单项选择题
A.She’d like to have the windows open. B.She likes to have the air conditioner on. C.The air is heavily polluted. D.The windows are already open.
A.What chemicals tears are composed of. B.Whether crying really helps us feel better. C.Why some people tend to cry more often than others. D.How tears help people cope with emotional problems.
A.Few of them can live long. B.Few of them get along well with each other. C.Most of them live a normal life. D.Most of them differ in their likes and dislikes.