The boy with two dogs _____ in the yard when the earthquake rocked the city.
#51208
A
is playing
B
was playing
C
are playing
D
were playing
推荐题目
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
I don’t like milk, but mother wants me ______. 
#51371
A
drink
B
drinking
C
todrinking
D
todrink
 She is heard_______ every day in her room.
#49195
A
sings
B
sing
C
to sing
D
singing