题干
一Did they have a good trip last week?
A：No，they didn't
B：No，they did
C：Yes，they are
D：Yes，they didn't
答案(点此获取答案解析）
A
一Did they have a good trip last week?
A：No，they didn't
B：No，they did
C：Yes，they are
D：Yes，they didn't
，则
的值为（ ）
