A large number of students           planting trees now, the number of the students         2000.
#41960
A
is, is
B
are, is
C
is, are
D
are, are
推荐题目
It ___________ heavily when I left school yesterday.
#41974
A
was snowing
B
is snowing
C
snowed
D
is snowy
 I__________ Lucy at the bank the other day.
#40180
A
see
B
saw
C
was seen
D
seeing
Becky took a photo of her friends while they _________ computer games.
#38014
A
play
B
are playing
C
were playing
D
have played