液压A和B系统都不工作时，还有哪种刹车可用

Without a proper education, people could _______ all kinds of crimes.

I have not heard anything from him since his _______.

Both sugar and salt can ______in water.

Students with _______ problems may apply for student loans.

Sometimes it is very difficult to _______ some of the English words. Even the native speaker can not help.

Carelessness made him fall in his job _______.

Some states in the United States _______ people to carry guns.

This boy was _______ for what he had done in the class.

Some lazy men would rather _______ than work.

What he said in the meeting _______ everybody present.