In order to make students have a good knowledge of science subjects, they are encouraged to______ their own science experiments.
#83509
A
operate
B
direct
C
manage
D
conduct
推荐题目
The number of  the students in our school ________ about 3000 and ______ them study hard.
#67936
A
is, a large amount of
B
are, a number of
C
are, large amount of
D
is, a large number of