IF YOU TRY TO CONCENTRATE ON ONE SUBJECT FOR TOO LONG, YOU MIGHT...
370. If you try to concentrate on one subject for too long, you might fed-up and
not really learn anything.
a. try to concentrate
b. on
c. for
d. might fed-up
--> d
370. If you try to concentrate on one subject for too long, you might fed-up and
not really learn anything.
a. try to concentrate
b. on
c. for
d. might fed-up
--> d