—My cousin is very clever but he doesn't work hard at his lessons.—________.

We should think of ways to stop the waste from the factory _____ our living environment. 

--What is the model plane like?--Well, the wings of the plane are___________ of its body.

I         go back to sleep when suddenly my bedroom became as bright as day.

 —Isn’t it time you _______ down to _______ your own things? —I’m sorry for the delay, Dad.