—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 |
— It’s such a pity. I didn’t get the first place in the exam.
— Come on. __________
| A．Nobody is perfect. | B．Congratulations! |
| C．Lucky you! | D．You really did badly |
It would be unfair to clone any extinct animalsthey were to live in a zoo.
| A．or | B．if | C．but | D．whether |
It seems the benefits are so obvious that we hope yousupport our side’s point of view.
| A．will can | B．need to | C．will be able to | D．may |
Although some boys in his situationto crime to get money for food and clothing, Louis never did.
| A．might have turned | B．might be turning |
| C．had turned | D．will turned |
There’s a fascinating driveout for tourists.
| A．to mark | B．to be marked | C．marking | D．marked |