按要求改写句子。
（1） I was at the cinema yesterday.  (改为否定句)
I         at the cinema yesterday.
（2） I went to school by bus last week. (改为一般疑问句)
       you      to school by bus last week?
（3）My holiday was exciting. (就划线部分提问)
      was       holiday?
（4）They will go to Hangzhou by plane. (改为一般疑问句)
      they       to Hangzhou by plane?
（5）We should save water.(同义句)
We shouldn’t         water.