I personally think__more listening, speaking, reading and writing is the key to__our English.
#95944
A
Doing; improve
B
To do; improve
C
Do; improving
D
Doing; improving
推荐题目
The salesman scolded the girl caught_______and let her off.
#97859
A
to have stolen
B
to be stealing 
C
to steal
D
stealing
There are altogether 6 people in the room, the baby____.
#96393
A
include
B
including
C
included
D
to include