-- The math problem _________ is not difficult. --- But after several tries , I have to give up _________ on it .
#49383
A
it’s , working
B
itself , to work
C
itself , working
D
its , to work
推荐题目
It’s good  __________  your health_________.
#48980
A
for, to drink milk
B
for, to drink a milk
C
of , drink milk
D
of , to drink milk
Animals don’t like ______ cages.
#50955
A
live in
B
live
C
living in
D
living
I phoned the dentist, he advised me ____ hot things.
#49123
A
not have
B
to not have
C
having no
D
not to have
So many kinds of sweets! I really can’t decide _______. 
#48578
A
what to buy
B
which to buy
C
to buy which
D
to buy what