题目内容
17．It took them two months to do this project．（改同义句）Theyspent two monthson this project．
分析 --他们花了两个月的时间来做这个项目．
--他们花了两个月的时间在这个项目上．
解答 答案：spent on考查句型转换．根据题干：It takes+sb．+时间（或钱）to do sth，同义句可以用spend …on sth．/in doing sth．从句中的took可知时态是一般过去时，所以用spend的过去式spnet，故答案是spent on．
点评 考查句型转换．此类题先掌握原句的句意及句型，根据根据已知的条件，再做同义句转换，用合适的单词符合原题意．
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