Parents________send their children to school when they reach six years old.

Our college is going to choose some ______ from the graduates to serve the poor village during the summer vacation．

I insisted he______ back the wallet to the lady, but he insisted he______it.

It ______ to me that I might try this way to deal with this problem. 

I liked this house at first sight, but what really made me decide to buy it was the beautiful _______ through the windows.