题目内容：

Please put up your hands if you konw the answer改为同义句

优质解答

Don't put up your hands unless ( 除非） you konw the answer
或
Please ( raise hands ) if you konw the answer.
加油!不明白再问!

追问：

Please—— ——if you konw the answer 只给了两个空怎么变呢

追答：

Please(hands up ) if you konw the answer