Mr. Wu is good ____ math. He teaches _____ math well.

h teachers are supposed ______theirstudents a test in class, even after class, ______better teaching results

Female soldiers cried ______they left their drill camps on the outskirts of Beijing on October 5, 2009

We are taught that a business letter should be written in a formal style _____ in a personal one.

What would you like to have for supper—________ noodles ________ rice is OK. I don’t mind.