We must ___ on our study..
#80547
A
concentrate
B
concentrate at
C
concentrate on
D
concentrate with
推荐题目
How many nationalities ______ our country ______?
#75688
A
is; consisted of
B
does; make up
C
is; made from
D
does; consist of
He __________ his aunt’s when he went to Wuhan on business.
#72925
A
called on
B
called at
C
dropped in on
D
dropped in
—When shall we start?—Let's _____ the time for the trip. What about 8:30? Is that all right?
#65017
A
set
B
meet
C
make
D
take
No one can imagine the difficulty he had ______ playing computer games.
#68895
A
to give in
B
to give up
C
giving up
D
giving in