the science teacher clened the bus 改为一般疑问句和否定句

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the science teacher clened the bus 改为一般疑问句和否定句

the science teacher clened the bus 改为一般疑问句和否定句
the science teacher clened the bus 改为一般疑问句和否定句

the science teacher clened the bus 改为一般疑问句和否定句
Did the science teacher clean the bus
the science teacher didn't clean the bus