What a pity! I missed meeting my boss at the airport because my car was _____ in the traffic jam.
| A．broken up | B．kept back | C．held up | D．kept on |
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 |