We must ___ on our study..
#80547
A
concentrate
B
concentrate at
C
concentrate on
D
concentrate with
推荐题目
——You looked upset. What’s the matter?——My plan was _____ again.
#65376
A
turned on
B
turned down
C
turned up
D
turned off
Much to our surprise, the first performance was well _______.
#82875
A
accepted
B
received
C
accepting
D
receiving
Excuse me, but can you tell me what UN in your papers ________?
#71190
A
stands up
B
stands for
C
stands out
D
stands up for
Mr Song said that global warming was largely for the country’s frequent extreme weather in 2011 .
#69104
A
blaming
B
to be blamed
C
being blamed
D
to blame