It took mary two weeks to prepare for the exam(改为同义句）Mary___

Mary spent two weeks in preparing for the exam.玛丽花费了2周时间来准备考试.spend的主语必须是人,常用于以下结构：(1) spend time ／money on sth.在……上花费时间（金钱）.例：I spent two hours on this maths problem.这道数学题花了我两个小时.(2) spend time ／money (in) doing sth.花费时间（金钱）做某事.例：They spent two years (in) building this bridge.造这座桥花了他们两年时间.(3)spend money for sth.花钱买…….例：His money was spent for books.他的钱用来买书了.