Desertification,the name for ______ happens when farmable land is turned into desert,is a growing world problem.
Mr Wang______an article on how to improve spoken English last month, but I don’t know whether he has finished it.
You can’t guess ______ when he was admitted by Beijing University.
As teachers, we feel______our duty to teach our children to be good wherever we are.
— Each of the students, working hard at their lessons, ______the book. — So have I.
After______for the job, you will be required to take a language test.