Sarah ______ change her mind, even though she knew the plan was hard to carry out.
| A．mustn’t | B．wouldn’t |
| C．shouldn’t | D．needn’t |
—Is this Mr White's office, Mary?
—Yes, ________.
| A．all right | B．it doesn't matter |
| C．after you | D．help yourself |
—Jenny, it won't be long before I receive the admission letter from Oxford University.
—________
| A．Good luck! | B．Congratulations! |
| C．Why so soon? | D．Don't worry. |
—Shall we ask Diana if she'd like to join in the party tonight?
—________. I'd like her to join us.
| A．As you wish | B．You're welcome |
| C．Hurry up | D．Not likely |
—Hey, can I ask you a favor?
—Sure, ________
| A．here you are. | B．just as I thought. |
| C．how is it going? | D．what can I do for you? |
—How far can you run without stopping?
—________. I've never tried.
| A．Don't mention it | B．That's all right |
| C．I have no idea | D．Go ahead |