Помогите пожалуйста!!!!!!) 2,3,4,5. пожалуйста

2. Tigers can run fast. Please, be quiet! Elephants can swim well Is this snake safe? ... they swim badly Some frogs are very loud 3. We are sitting in the park David is studying Chinese I am working at the moment The dogs are eating in the kitchen Sarah is having breakfast 4. We are not sitting in the park David is not studying Chinese I am not working at the moment The dogs are not eating in the kitchen Sarah is not having breakfast 5. Are you doing a test? Yes, I am Is your teacher sleeping? No, she is not Are your friends studying? Yes, they are Is it raining today? No, it's not Are your classmates singing? No, they are not Is your dad working? Yes, he is