He often spends much time________playing the piano. 
#49131
A
practice
B
practices
C
to practice
D
practicing
推荐题目
The book is very difficult. ________ read something easier?
#49670
A
Why don’t
B
Why not
C
Why you not
D
Why not you
It is a good time _______.
#49260
A
sing.
B
to sing.
C
singing.
D
sang.