When we visited my old family house, memorycame_________ back.

I have a very bad cold.— Well, have you ever heard of a saying which goes “_______ a cold and starve a fever?”

I’m going to Fuzhou tomorrow. Have you got anything___ to your parents there

I would have paid a visit to you _______ possible.[ ]

The more one is _________ the English-speaking environment, the better he or she will learn the language．