—Listen! Is Professor Johnson giving a report in the hall?
—No, it be him. He has gone to Japan.
A．needn’t B．may not
C．mustn’t D．can’t
—Susan has bought a large house with a swimming pool.
—It ______ be very expensive. I never even dream about it.
A．must B．might
C．can’t D．shouldn’t
—I’m a little tired. Let’s go to the zoo by taxi.
—We take a taxi. It’s not far from here.
A．can’t B．mustn’t
C．couldn’t D．needn’t
—Another cup of coffee?
—No, thanks. I _____ be off. Mary is waiting for me.
A．can B．may
C．must D．might
You _______ smoke in the hospital.
A．needn’t B．oughtn’t to
C．ought to not D．may not
You’d better _____late again.
A．don‘t B．not be
C．not being D．won’t be
