—The trip must have been terrible，wasn’t it?
—No.________，I enjoyed every minute.
A．On the other hand B．At one time
C．At the same time D．On the contrary
He has been acting strangely these days. I can’t________ his actions at all.
A．account for B．ask for C．call for D．stand for
Prices of the basic necessities of life have been going up sharply since word came that war would________ between the two countries soon.
A．watch out B．break out C．die out D．give out
—We don’t permit____ in our school. Would you please put your cigarette out?
—Forgive me. I didn’t know.
A．to smoking B．to smoke C．smoking D．having smoked
_______ she came for school late is that she missed the early bus.
A. What B. That C. Which D. Why
The telephone rang but I didn’t hear it. I _______ asleep.
A. must be B. should be C. ought to have been D. must have been
