The teacher asked the boys ____on the wall.

What would you do if you _______ a million dollars— I would give it to charity.

（2014·全国大纲卷）I think Mrs. Stark could be _______ between 50 and 60 years of age.

More and more trees should be planted in spring to _____ sandstorms happening frequently.[ ]

He is looking for a job, one he can make the most of his talent.