What would have happened ________，as far as up to the river bank.
| A．Bob had walked farther |
| B．if Bob should walk farther |
| C．had Bob walked farther |
| D．if Bob walked farther |
We ________ have bought so much food now that Suzie won't be with us for dinner.
| A．may not | B．needn't |
| C．can't | D．mustn't |
—Why are your eyes so red? You ________ have slept well last night.
—Yeah, I stayed up late writing a report.
| A．can't | B．mustn't |
| C．needn't | D．won't |
Harry is feeling uncomfortable.He ________ too much at the party last night.
| A．could drink | B．should drink |
| C．would have drunk | D．must have drunk |
Days later, my brother called to say he was all right, but ________ say where he was.
| A．mustn't | B．shouldn't |
| C．wouldn't | D．mightn't |
The door ________ open, no matter how hard she pushed.
| A．shouldn't | B．couldn't |
| C．wouldn't | D．mightn't |