I will never forget the days _____ we spent together in the country. I will never forget the days _____ we worked together in the country.
Excuse me, I have no ______ on me. Can you _____ the note of 100 yuan ?
They made a bet _____the white horse.
.I was about to leave _____ the telephone rang.
Children under 10 are not permitted _____ the film.
The bird hid _____ food inside trees for the winters.