Charles Babbage is generally considered ____ the first computer.
| A．to invent | B．inventing | C．to have invented | D．having invented |
You ___ me, but since you have,I’ll keep it secret from others.
| A．needn’t have told | B．didn't need to tell | C．wouldn't have told | D．couldn't have told |
If you have something important to do, you ___ waste any time.
| A．needn’t | B．mustn’t | C．may not | D．won’t |
---Where is my reference book? It was here a moment ago.---Someone ___ it by mistake.
| A．could have taken | B．must take | C．might take | D．must have taken |
Ireland lies ___ of Britain.
| A．in the east | B．in the west | C．to the east | D．to the west |
The boy promised ___ mother never to lie to ___ again.
| A．his, him | B．her, her | C．his, her | D．her, him |