-- The math problem _________ is not difficult.
--- But after several tries , I have to give up _________ on it .
A.it’s , working | B.itself , to work | C.itself , working | D.its , to work |
-- The math problem _________ is not difficult.
--- But after several tries , I have to give up _________ on it .
A.it’s , working | B.itself , to work | C.itself , working | D.its , to work |