Надо ставить слова 1. tigers cn run quick/fast 2. please be quiet/quietly 3. elephants can swim good/well 4. is this snake safe/safely 5. cats aren`t good swimmers. they swim bad /badly 6. some frogs are very loud/loudly / you can hear them at night.

1)Tigers run fast(тигр бежит быстро)
соблюдайте тишину)
3)Elephants can swim well (слоны могут хорошо плавать)
4)Is this snake safe (это змея безопасный)
5)Cats aren`t good swimmers.They swim badly
6)Some frogs are very loud.You canhear them at night