To see a young couple loving each other is no_________, but to see an old couple loving each other is the best sight of all.

Our physics teacher told us that light_______ faster than sound.

It’s high time that he settled down in the city and ____ a new life.

one children want to challenge themselves by learning a language different from ______ their parents speak at home.

These problems are too hard to . Will you give me some advice— There are many ways. The most important is to have a careful plan.