There was a _____ look on his face. He found what the expert said too difficult to understand.
#95567
A
puzzle
B
puzzling
C
puzzled
D
to puzzle
推荐题目
The boy insisted ______ in a nearby school. 
#92065
A
to be taught
B
being taught
C
on being taught
D
on teaching
we were ______ at the news of her sudden death.              
#95901
A
astonishing
B
to astonish
C
astonished
D
astonish