The boy isn’t old enough ________ with the difficult problem by himself. 
#50365
A
deal
B
deals
C
dealing
D
to deal
推荐题目
My computer is broken. I’ll ________.
#49162
A
get it repair
B
get it repairing
C
get it repairs
D
get it repaired
You shouldn’t leave the door _____when you go out.
#51136
A
close
B
closing
C
open
D
opening