Leo was late for class again. So he____ clean the classroom after school.

Peter is going to look for a new job_____________ the company offers him more money．

The scientist has been greatly successful in the experiment that he _____ to do three years ago. [ ]

There is a great deal of evidence_______ that music activities engage different parts of the brain.

(2013·四川南充市一模)My favorite writer is Mo Yan, some of ________ novels have a surprising ending.