—It was a red light, William. You ____ the car.
—Sorry. I didn’t see it.
| A．must stop |
| B．should stop |
| C．must have stopped |
| D．should have stopped |
I took them _____ because I didn't know which was the best.
| A．neither | B．nobody | C．no one | D．all |
—Are you going to watch the game？
—I'm sure _____ ,for it promises to be a close one.
| A．so | B．I will | C．not | D．I won't |
—The problem isn't difficult for the children to work out, is it？
—_____ . Perhaps they should have been given a more difficult one.
| A．Yes, it is | B．Yes, it isn't | C．No, it is | D．No, it isn't |
—Shall I tell John about it？
—No, you _____ ,I've told him already.
| A．needn't | B．won't | C．mustn't | D．shouldn't |
_____ is known to all, paper was first made in China.
| A．It | B．That | C．Which | D．As |