He hasn’t decided _______ to go by bus or by train. 
#43063
A
if
B
whether
C
how
D
that
推荐题目
Good parents should be _______ with their children.
#42159
A
patient
B
frustrated
C
unfair
D
funny
We won’t see any flowers until May.
#43808
A
We will see flowers only in May.
B
We won’t see flowers after May.
C
We will see flowers before May.
D
We will see flowers when May comes.