I can still recognize Mr Johnson, who is standing by the door, even though he looks ___different now

Do you agree that lions and tigers ______ the cat family?— I have no idea

Doyou have fun ________ here —Yes,I do. It makes me very ________.

Please open the window, Daniel.—________ I can’t hear you well.

I a report about the air pollution in my hometown all the morning and haven’t finished it yet.