Beijing took steps to limit the kinds of high-risk of borrowing money from the banks that can create the high price of housing, ______ happened in the United States.
We must show concern ______ each other.
I ______ too much reading.
We hope that she will _____soon.
If we can keep _____ this speed, we'll arrive there in two or three hours.
The Great Wall was built to keep ______ the invaders.