第一节：改写句子：　　下面是关于Mr. White 上英语课的三对句子。　　71. Mr. White drew a picture on a piece of paper so that he could show the meaning of an English word.　　Mr. White drew a picture on a piece of paper ______ the meaning of an English word.　　72. Everybody in the class was asked to tell a story about the picture.　　Mr. White __________________ to tell a story about the picture.　　73. They spent more than twenty minutes on the work.　　It __________ more than twenty minutes to do the work.

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to showwas to took