The classroom can't have been cleaned by Li Ping because he didn't come to school today.
教室不可能是李平打扫的，因为他今天没来上学。
His name is Li Ping. He studies law there.
他叫李平，在那儿学法律。
How does Li Ping get to school? He rides his bike.
李平怎样到校的？骑自行车。
He is superior to Li Ping in mathematics.
他在数学方面比李平强一些。
He is superior to Li Ping in mathematics.
他在数学方面比李平强一些。
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