To make our city greener and cleaner, we need ______ trees.

— Dear students, please read every word carefully. The more 　　　 you are, the　　　 mistakes you’ll make. — Thanks, Mr. Lee. We can do it well. 

Boris has brain. In fact, I don’t think that anyone in the class has ________ IQ. 

Now Chinese people are living a _________life than before.

I become ________ in American history.