Mary likes classical music _____ her brother likes pop music.

—Professor Wang, must I hand in the paper this week? —No,（ ） . You can hand it in next week.

Ted, （ ） yourself and don’t get your coat dirty again, or you will get into trouble!

You needn’t introduce him to me. I’ve met him on several _____.

Scientists say it may be five or six years （ ） this medicine is tested on human beings.

Only when （ ） in the afternoon （ ） able to leave.

（ ） student with a little common sense should be able to answer the question.

（ ） we have all the materials ready, we should begin the new task at once.

She is very （ ） to his ugly appearance.

When Mary paid the bill, she was given a _____ for her money.

____________ , we will review all the lessons before the final exam.

Before using your new pressure cooker, read the following （ ） carefully.