Mr．Smith is always on time for everything．How ____ it be that he was late for the important meeting?
| A．should | B．can | C．may | D．must |
—I’m fed up with these naughty boys!
—Maybe we can find a new direction for their _________ energies. How about a football game?
| A．abundant | B．abnormal | C．aggressive | D．alternative |
The organizers promise _________ wins the first prize a chance to go abroad.
| A．who | B．whom | C．whoever | D．whomever |
Due to the policy of free highway fees on major holidays, too many passenger cars are trapped on the highways, causing heavy traffic jams, some even _________ for several hours.
| A．held up | B．broken up | C．taken up | D．given up |
Clothing made of man-made materials has advantage over _________ made of natural ones like cotton, wool or silk.
| A．one | B．it | C．that | D．the ones |
To forbid the cheating strictly in this important exam, the authorities have released a rule that students _________ bring any reference books and stationery into their classrooms.
| A．will not | B．shall not | C．might not | D．need not |