The house, ______ we bought last month, is very nice.

I shall never forget the days ________ I spent in Beijing University, ________ has a great effect on my life.

 Great changes have taken place in my home town. It’s no longer ______ it was ten years ago, ______ I spent my childhood there.

This is the village ____ the famous scientist was born.

The people's government took good care of the children, four fifths of _____ parents lost their lives in the Anti-Japanese War．