—How do you think he managed to improve his English in such a short time? —______ four hours on it every day.
#96810
A
Because of spending
B
To spend
C
By spending
D
Spending
推荐题目
She was the first    about it.
#98006
A
to learn
B
learning
C
learning
D
to have learned
This problem is said _______ three times, but he still can’t understand it.
#90815
A
to have been explaining
B
to have explained
C
having been explained
D
to have been explained
Remember _______ off the light when _______ to bed.
#98423
A
turning, going
B
to turn, to go
C
turning, to go
D
to turn, going