—Look at these tracks. It __________ be a wolf.
—It needn't be. It be a fox.
| A．must ; could | B．may ; might |
| C．need ; must | D．could ; need |
Great attention must be paid _______ welfare, especially in the poor area.
| A．develop | B．to develop | C．to developing | D．developing |
Today CCTV offers a great _______ of programs to meet different needs and _______.
| A．variety; tastes | B．many; interests |
| C．deal; likes | D．number; habits |
Careful surveys have showed that audience _______ teachers and students are more likely to take seats _______ directed.
| A．1ike; that | B．as; that | C．1ike; as | D．as; like |
Beginning college is exciting：many of us can be easily excited by _______ details of running _______ well-balanced life.
| A．／; the | B．the; a | C．／; a | D．the; ／ |
40. When I was very young, I thought that inside the radio ______ who liked talking very much.
| A．a group of people lived | B．a group of people did live |
| C．did a group of people live | D．lived a group of people |