The war made ______ impossible for the scientist to goon with his research.

Studies have shown that the right and left ear sound differently.

Would you like camping with me—I’d like to. But I’m busy my homework.

Li Dong ________ for France next week. Let’s hold a party for him.

WhatdoyouthinkofPeter? — He______bereallydifficulttogetalongwitheventhoughhe’sanicepersoningeneral.[ ]