It’s ten o’clock. The children are ___ a good time.
#41953
A
having
B
doing
C
taking
D
playing
推荐题目
By the end of last month, I _____ all the CDs of Justin Bieber.
#42234
A
collect
B
collected
C
have collected
D
had collected
I would like to buy the black pen because I ___ that kind of pen ____ well. 
#39870
A
have told; writes
B
have been told; writes
C
was told; wrote
D
have been told; is written