题目
-Jenny is ________ the difficult math problem．
-I'm sure she'll ________．（ ）
-I'm sure she'll ________．（ ）
A.
working out；work it out
B.
working on；work it out
C.
working on；work it on
D.
working out；work it on
知识点：Unit 3 Could you please clean your room?章节：未标注