题干
She said that she would do _______ she could __________ her daughter laugh.
A：what, make
B：that, make
C：what, to make
D：that, to make
答案(点此获取答案解析）
C
She said that she would do _______ she could __________ her daughter laugh.
A：what, make
B：that, make
C：what, to make
D：that, to make
，
，则集合
=（ ）