Students should do everything they can __their study.
#50600
A
improve
B
to improve
C
improving
D
improved
推荐题目
His grandparents used to ________ a walk after dinner, but now they are used to ________ a walk after breakfast.
#50244
A
take, take
B
taking, taking
C
taking, take
D
take, taking
I often spend a lot of time ________ after class.
#49146
A
practicing play
B
to practice playing
C
to practice to play
D
practicing playing