Theory is based on practice and ________ serves practice. 
#27483
A
in turn
B
by and by
C
by chance
D
in this case
推荐题目
The reason why we were so late is________
#26955
A
because of the car’s breaking down
B
That the car breaking down
C
because the car broke down
D
that the car broke down
You’d sound a lot more polite if you make a request _____ a question.
#27182
A
in search of
B
in the form of
C
in need of
D
in the direction of