问题补充:
you are supposed to do you don like a thing is change it. Don complain.
A. That; why
B. What; when
C. What; where
D. That; how
答案:
A. That; why
(答案→)B. What; when
C. What; where
D. That; how
解析:B句意:当你不喜欢一件事情时,你应该做的是改变它。不要抱怨。“you are supposed to do”为主语从句,该从句缺少宾语,表示“事物”且语境中并无选择含义,故用what引导;“you don like a thing”为时间状语从句,作are supposed to do的状语,说明其时间,故用when引导。因为主语从句“What you are supposed to do”中含实义动词do,故is后的表语需为省去不定式符号的不定式,故change作表语。