---Must we donate our pocket money to the poor right now?
---No, you _______. You can think it over and do it before Friday.
| A．mustn’t | B．needn’t | C．can’t | D．couldn’t |
You look _____. What's up, sir?－ I can't find my ticket, but it's time to check in.
| A．sleepy | B．hungry | C．tired | D．worried |
How was your climbing Mount Huang?
---I didn’t believe I could do it __________I got to the top.
| A．until | B．while | C．after | D．because |
--- What is your teacher strict you in class? --- Our habits.
| A．with; / | B．in; with |
| C．with; in | D．with; at |
Do you know ______ Zunyi or not tomorrow?
| A．whether are they leaving for |
| B．whether they are leaving for |
| C．if they are leaving for |
| D．if are they leaving for |
Work harder, _______ you will get more grades in the coming exam.
| A．and | B．so | C．or | D．but |