Exercise is good ______us.
#47654
A
at
B
in
C
of
D
for
推荐题目
It is very kind _____ you to help me with my lessons because it is very difficult _____me to learn them well.
#50539
A
of; for
B
of; of
C
for;of
D
for; for
I went to the park ______ yesterday.
#49631
A
on a bicycle
B
by the bicycle
C
in a bicycle
D
by bicycles