You had better______ some money for special use.
--- Are you satisfied with what he did?--- No. It couldn’t have been ______.
--- He worked out such different questions at a very young age.--- Oh, he ______ a very smart student then.
In our childhood, we were often ______ by Grandma to pay attention to our table manners.
Many lifestyle patterns do such _____ great harm to health that they actually speed up ____ weakening of the human body.
Stay awake! You should know that it ________ to sleep in class.