The problem is difficult for me work out.
#51005
A
very; to
B
enough; to
C
so; that
D
too; to
推荐题目
The boy isn’t old enough ________ with the difficult problem by himself.
#50365
A
deal
B
deals
C
dealing
D
to deal
We’re going to practice_____ English as much as possible.
#50820
A
speak
B
to speak
C
speaking
D
speak about