It’s necessary for us     every subject well. 
#47007
A
learn
B
learns
C
learning
D
to learn
推荐题目
____ come again.
#85482
A
Do
B
Can
C
May
D
Did
It is _____ he often fails in exams _____ makes his parents worried about him.
#84753
A
what; that
B
that; what
C
that; that
D
/; that
Can you tell me________it was________your cellphone was lost? 
#84700
A
where;that
B
which;that
C
that;where
D
where;which