Mrs Zhang has taught ______math for three years and she teaches very well.

____ do you study for a math test? —I study math ____ lots of exercises.

If I went to the moon, I ______ bring something unusual back to the earth.

Who did it better, Bill or Henry?— I think Bill did just _______ Henry.

What’s the weather _________ in Beijing?——It’s terrible in summer, too cold and humid.