下列关于文学常识的表述，不正确的一项（ ）

They____on the program for almost one month before l was arranged to help themNow, we____on it as no result has come out

He tries _____English well. And he practices_____English every day.

3.Once one’s desire ______ reason, trouble is sure to follow.

Hard as a teacher may try, he can’t ______to make all his students make a difference in study, letting alone in life.