Many trees ________ along the streets every year. So the air is very fresh now.
#44614
A
plant
B
are planted
C
planted
D
were planted
推荐题目
 The students    how to do the experiment in class yesterday.
#45055
A
were taught
B
better
C
was taught
D
teach
Another two months will be needed before the bridge _______.
#44397
A
completes
B
is completed
C
has completed
D
will be completed
The man is very ill and he has _______.
#44621
A
operate on
B
to be operated on
C
to operate
D
being operated on