The look on her face suggested she the maths problem．A.puzzled; be puzzled by; p
来源：网络
时间：
推荐文章
The _________ look on her face suggested she _________ the _________ maths problem．
A.puzzled; be puzzled by; puzzling
B.puzzling; was puzzled by; puzzled
C.puzzled; was puzzling over; puzzling
D.puzzling; be puzzled over; puzzled
试题答案
C
puzzled多叙述人的感受。puzzle over表示“苦思”；puzzling，表示“让人感到困惑的”。