Shortly after the accident , two ______ police were sent to the spot to keep order . 
#14556
A
dozens of
B
dozens
C
dozen of
D
dozen
推荐题目
The farmers needed________agricultural technology. Therefore,      ________skilled workers were sent there.
#14430
A
a great number of, a large amount of
B
large amounts of, the number of
C
a large amount of, a great number of
D
the amount of, a great number of
An athlete can’t play balls well without severe ______.
#12468
A
exercise
B
teach
C
education
D
training