Many students today suffer from ________ problems, since they are under too much pressure.
—It shouldn’t take long to clean up after the party if we all volunteer to help.—That’s right. ________.
The building the windows are bright at night is our school library.
It was not until dark _____ he found _____ he thought was the correct way to solve the problem.
_________ this is the biggest mistake we have made.
It i s the second time that the poor area_______.