．（山东卷28）. The school rules state that no child shall be allowed out of the school during the day, ______ accompanied by an adult.
| A．once | B．when | C．if | D．unless |
23. — You can't finish the book in less than an hour, I suppose?
—_____________.
| A．Yes, I'm sure I can | B．No, hardly | C．Sorry, I can't | D．I don't think I can |
22. —You've made great progress in your English study, haven't you?
—Yes, but much____________.
| A．remains to do | B．is remained to do | C．remains to be done | D．is remained to be done |
第二部分：英语知识运用（共两节，满分45分）
第一节：语法和词汇知识（共15 小题；每小题1分，满分15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
21. Unfortunately, when I dropped in, Doctor Li _____ for Beijing to join in the fight against SARS, so we had not enough time for a talk.
A. just left B. has just leftC. is just leaving D. was just leaving
I really regret _______ to the party with you last night.
| A．not to go | B．not going | C．not go | D．not went |
Asimov began having his stories ______ in science magazines in 1939.
| A．publish | B．published | C．publishing | D．to publish |