You should make it a rule to leave things _______ you can find them again.

My aunt _____ my sister to marry Henry, but my sister married Frank at last.[ ]

The expert’s theory, _____ my opinions were based, proved right in the end.

Cattle ________ well in the country market at present, according to the evening news.[ ]

Mr Jordan, we want to hear your opinion about the current NBA games．– OK, I ____ to that