29. A. generous B. successful C. serious D. powerful
28. A. pointed B. turned C. worked D. found
27. A. call B. letter C. check D. notice
26. A. appeared B. exhibited C. calculated D. shown
25. A. drivers B. guests C. customers D. adults
24. A. neat B. hot C. warm D. attractive
23. A. supplied B. poured C. equipped D. filled
22. A. away B. behind C. over D. out
1.[原句]The other day I was showing the boys the weekly chemistry experiment when, before I knew it, the mixture was bubbling over everywhere. 有一天,我正在给孩子们做每周一次的化学实验的演示,我还没明白怎么回事,混合剂就到处冒气泡了。
[模仿要点] 句子结构: when + 时间状语从句+before +时间状语从句
[模仿1]陈凯歌,电影梅兰芳的导演,正在为这部电影做大量准备的同时,甚至在它公演前,他都承受着巨大的压力。
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答案:Chenkaige, director of MeiLanfang , was making quantities of preparations for the movie when, even before it was put on , he suffered from great stress.
[模仿2]八月的时候我们收到了他的一封信,在此之前我们不知道他已经入伍了。
答案:It was August , before we knew he had joined the army, when we received a letter from him.