Pressed from his parents, and ______ that he has wasted too much time, the boy is determined to stop playing video games.
| A．realizing | B．realized |
| C．to realize | D．being realized |
—Shall I lock the lab now before I go home?
—________.I'll check it myself later.
| A．Go ahead | B．No problem |
| C．No hurry | D．Don't bother |
—Can I ask you a rather personal question?
—________
| A．Thanks，take it easy. | B．Thanks，help yourself. |
| C．Of course，go ahead. | D．Of course，why not? |
—I had a great time in the summer holidays.We went scuba－diving in Hawaii.
—Wow！________
| A．I'm going to Hawaii，too. |
| B．How generous you are! |
| C．That sounds really cool! |
| D．Enjoy yourself! |
—Thank you very much for helping me with the luggage.
—________.
| A．Don't say so | B．With pleasure |
| C．I'd love to | D．Not at all |
—Do you mind if I open the window?
—________.Go ahead，please.
| A．Yes | B．No | C．Sorry | D．Of course |