It is generally believed that _____ study, we can gain both knowledge and skills.
#26619
A
with
B
through
C
by
D
at
推荐题目
—Do you have________trouble dealing with the problem?—Yes. It is________me. 
#28284
A
no; easy for
B
some; with
C
any; within
D
any; beyond
He tried to invite some famous pop stars to sing in the concert ______, but failed.
#27151
A
with free
B
for freely
C
with freedom
D
for free