根据所给提示，完成句子。每空一词，含缩略词。

根据所给提示，完成句子。每空一词，含缩略词。
小题1:Mary and Tom are used to living in this big city now. (改为否定句)
Mary and Tom to living in this big city now.
小题2:Students should learn everything by thinking alone . (对划线部分提问)
____________ ____________ students learn everything?
小题3:At first, Teresa was too nervous to talk in front of the class. (改为同义句)
At first, Teresa was nervous she couldn’t talk in front of the class.
小题4:Sara’s hair is too long. She needs to cut her hair. (合并为一句)
Sara needs to her hair .