- Must I clean the Lable now? - No, you ____.  You may do it later.

－Look, your sister is playing the piano over there.－She ______ be my sister. She has gone to America.

Mr. Baker, a number of students want to see you. _______ they wait here or outside?

A traffic regulation released in a foreign country states that passengers sharing a car with a drunken driver _____ be punished together with the driver himself.

Anyone whose performance is best received by the public____ be given an opportunity to show their talents at the Great Hall of the People in Beijing.