Prof. Richard was crazy about his research. His illness_________ his many years of hard work and irregular diet.

There is a big garden in the neighborhood, _______ actually has become a good place for people to meet and communicate.

My fnext week.

My English teacher gave us a suggestion yesterday, _____is often the case, ______ our monitor organize a debate after class.

If you have________question, you may email me at jessen@hotmail.com.