The boy said _____ couldn’t he work out the problem but his teacher didn’t know how to do it[ ]

___ New Year’s Day around the corner, all the salesmen were trying hard to talk customers_________ buying their goods.

Where is Jack— On the playground. He ______ football with his classmates.

Only when all the fish in the lake died _____ how serious the pollution was.[ ]

When the headmaster spoke out his plan, the _____of the students in the class ____ against it.