A: ______
B: Never mind. What can I do for you?
[     ]
A. Don't rush.
B. Sorry to trouble you.
C. Can I help you.
D. No hurry.
—Can you stay here longer?
— _______. But I have to be back tomorrow.

[     ]

A. I'd love to
B. I'm afraid not
C. I'm sorry, I can't
D. No, thank you
— I still don't know how to work out the problem.
— ______ I will send you an email to tell you.
[     ]
A. I'm sorry about that.
B. No problem.
C. With pleasure.
根据所给情景,从A、B、C三个选项中选出最佳选项。
1. — Can I take this seat?
    — _______. It's for our teacher, Mr Li.
[     ]
A. Of course
B. You'd better not
C. Yes, please
2. — You speak English well.
    — _______.
[     ]
A. Don't say so
B. Just so-so
C. Thank you
3. — There's going to be an exciting basketball match in our school.
    — _______ I can't wait.
[     ]
A. It's boring.
B. What a pity!
C. That's great.
4. — I have to make a speech at a meeting. I feel nervous about it.
    — _______. I'm sure you can do it well.
[     ]
A. Take it easy
B. Don't be so sad
C. That's all right
5. — What do you think of the math problem?
    — _______. All of us can work it out.
[     ]
A. It's a piece of cake
B. It's difficult
C. I hope so