— Dad, must we wait for the green light? — Yes, I’m afraid we ________. That’s the traffic rule (规则).
#40322
A
can
B
may
C
need
D
have to
推荐题目
The boy doesn’t sing ________ the others, but he dances best of all.
#43266
A
so well as
B
as good as
C
more worse than
D
more better than
The girl is only two years old. She is _______ to go to school. 
#43378
A
old enough
B
young enough
C
too old
D
too young