It is rather that we still do not know how many species there are in the world today.
| A．misleading | B．embarrassing |
| C．boring | D．demanding |
—How about going out for a break?
—________. We've been working for three hours.
| A．Take your time | B．It's my pleasure |
| C．Come on | D．I totally agree |
—I've got something weighing on my mind. Could you give me some advice?
—________. Tell me all about it and I'll do what I can.
| A．Don't mention it | B．No way |
| C．No problem | D．Forget it |
—Would you like a glass of wine?
—________. I don't drink.
| A．No, thanks | B．Yes, please |
| C．I don't like it | D．It's my favorite |
—Mary's been offered a job in a university, but she doesn't want to take it.
—________？ It's a very good chance.
| A．Guess what | B．So what |
| C．Who cares | D．But why |
—I'm sorry I made a mistake!
—________. Nobody is perfect.
| A．Take your time | B．You're right |
| C．Whatever you say | D．Take it easy |