—Visitors need to know all the travel routes to Paris, ______?

—Sure. But The trip has not arranged.

A. do they         B. need they     

C. don't they      D needn't they

---It’s very nice of you to help me solve such a big problem.

---_______.

A．That’s all right.

B．Don’t worry.

C．It’s my pleasure.

D．Take it easy.