It is necessary to explain your theory _____, otherwise the   audience won't make sense of what you are trying to get across.
#25300
A
on purpose
B
at length
C
at random
D
on average
推荐题目
He didn’t do well _____ Chinese. He had some trouble ______ it.
#27461
A
in, in  
B
for, with
C
with, for
D
in, with
He was born ____ a very cold night _____ December. 
#28499
A
in; in
B
In; of
C
on; in
D
on; of
I’m taller than Mike ___ head.
#29052
A
to a
B
by a
C
for the
D
in the