They often change the kind of crop in each field ____ few years, for example, growing corn or wheat and then the next year peas or soybeans.

—Which would you prefer, beer or juice? —_______ will do. It doesn’t make any difference to me.

__________ the reason , research shows that laughter is good for your health.

The number 5.12 is a special number, ______I think, that will be remembered by the Chinese forever. 

I like_________ when the teacher says that my work is satisfactory ________.