.
It ________ I arrived at the station ________ I found the train was delayed.
| A．was until; that | B．wasn’t until; that | C．was until; when | D．wasn’t until; when |
—Shall I help you with the math problem?
—________.
| A．If you wish | B．With pleasure |
| C．You're welcome | D．That's right |
—Why don't we just leave it until tomorrow?
—________ I'm dead tired today.
| A．Forget it. | B．I couldn't agree more. |
| C．It all depends. | D．Don't mention it. |
—I forgot my mother's birthday!
—________ Better keep it in mind next year.
| A．I'm afraid so. | B．So what? |
| C．You did? | D．No wonder. |
—Would you mind giving me a lift?
—________. I am happy to.
| A．Not at all | B．Don't mention it |
| C．Never mind | D．You don't say so |
— I wonder if I could make a living by writing.
—________？
| A．Who cares | B．How dare you |
| C．For what | D．Why not take a chance |