You can ______ this car with that one; then you will see which one is better.

I fell off my bicycle and broke my leg yesterday．—Is that ____ you drank too much？

I’ll never forget the moment _____I first met Mary and _____ makes me already feel happy.

I think the race is ________than before.

Doctor Wang, who ____ western medicine for six years in New York, is now working in a famous hospital in Shanghai.