---Listen! Who ______ in the next room? ---I think Sam is.
#41778
A
sing
B
sings
C
singing
D
is singing
推荐题目
More and more parks ________in Mentougou in five years.
#39494
A
build
B
built
C
will be built
D
were built
We __________for a picnic if it ___________this Sunday.
#37177
A
won’t go , will rain
B
won’t go , rains
C
didn’t go , is raining
D
don’t go , don’t rain