It was an agreement, ______ could not be changed.
| A．of which details | B．whose the details |
| C．the details of which | D．all whose details. |
---- Do you mind if I smoke here, madam? ---- ________, sir.
| A．Of course not. It’s not allowed here | B．Great! I’d rather do that myself |
| C．I’d rather you didn’t, actually | D．No, you can’t |
. —Can you help raise some money for the new journalist’s amusement center?
—_____. But give me some time.
| A．Thanks | B．Go ahead | C．Sure | D．Sorry |
—I don’t believe we _______ before.
—Well, I saw you once at a party, but we ______ introduced.
| A．have met; weren’t | B．met; weren’t |
| C．have met; haven’t been | D．met; haven’t been |
I waved to Nancy, but she was ______ in her thoughts, and made no response.
| A．involved | B．stuck | C．absorbed | D．interested |
You must observe and gather information like Nicolaus Copernicus ________ you want more career advancement opportunities.
| A．or | B．because | C．unless | D．if |