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

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! 再问： Please—— ——if you konw the answer 只给了两个空怎么变呢 再答： Please(hands up ) if you konw the answer