Yesterday our chemistry teacher teacher asked so difficult a question ( )puzzled all of us.

1、which 或者 whatwhich (what) 作为从句的主语,整个从句which(what) puzzled all of us 修饰 question的2、that分析从句 主谓宾齐全,而且so .that.一般作为固定用法,翻译为 太.以至于.so beauiful a girl that eve...Yesterday our chemistry teacher teacher asked so difficult a question __as__puzzled all of us.答案是as怎么解释？so....as意思也是太......以至于.....The girl was so excited as to shout herself hoarse. 那女孩太兴奋了，以至于嗓子都喊哑了。 so....that....所在句子是带结果状语从句的复合句, 而so....as......所在句子是简单句Just now they were so happy that they jumped. 可改为: Just now they were so happy as to jump. 题中横线后面it puzzled all of us，是完整的句子，应该填that。