Tom is so worried about the test that he said he wasgoing to study all night.—Tell him he should quit ______ and get some help.

I find difficult to work with her.

The single most important factor ____contributes to success is _____ you do every single day．

The novels written by the author sell best, but five years ago no one could have imagined how great a role he _____in the literary world

go with us, __________