The old scientist took up walking as a regular form of exercise, which, of course, is of great to his heath.
| A．benefit | B．favor |
| C．sense | D．relationship |
---What shall we do tonight then?
---_________--whatever you want.
| A．Help yourself | B．It’s a deal | C．No problem | D．It’s up to you |
---Try not to work yourself too hard. Take it easy.
--- Thanks. _________
| A．So what? | B．No way | C．What for? | D．You， too. |
—The trip shouldn’t take more than an hour.
—_______.It is at least two hours.
| A．I guess so | B．That’s it |
| C．You must be joking | D．It depeds |
—I’m sorry for being late. I should have phoned you earlier.
--_________. I’ve just arrived.
| A．That’s no trouble | B．You are welcome |
| C．That’s all right | D．You can never tell |
—Goodbye, John. Come back again sometime.—Sure. ______.
| A．I did | B．I do | C．I shall | D．I will |