Listen! The bird    in the tree.
#40584
A
sing
B
singing
C
is singing
D
is sing.
推荐题目
I _____ the newspaper while my mother _____ TV plays yesterday evening.
#39917
A
was reading; was watching
B
was reading; watched
C
read; was watching
D
read; would watch
Listen, who______ in the classroom?
#40694
A
sings
B
sing
C
is singing
D
singing