以下是引用lea0832在2004-7-31 12:30:00的发言:7.The operating principles of the telephone are ---------they were in the nineteenth century. A.the same as today B. the same today as 为什么不选A呢? 后面的句子决定用as作连接词 这里可能要区分 same的两个词性:形容词与代词。 如果是A则same是代词,A应改为:the same as today's; 如果是B则是形容词,the same today as+ clause 呵呵,解释的不太清楚,楼主再想想吧,等牛牛来补充! 10.Although the many hours of summer sunshine in Canada's Kiondike region produce good vegetable crops, the long winters rarely permit------. A. the ripening of gain crops B. to ripen grain crops 为什么要选A, RIPEN不是动词吗? 此题可能要从逻辑上来理解,如果选B则不定式的主语是谁?“成熟”只能是谷物自己的“成熟”,如the ripoening of gain crops, crops are repiening , etc.
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