____________ make so much noise. The students are taking an exam.

1. A.
   Isn't
2. B.
   Doesn’t
3. C.
   Don’t
4. D.
   Haven’t

— Make sure all the lights ______ when you leave the room.
— OK, I will.

---Make sure that you will come here on time.   --_______.

A. Certainly, I will   B. Don't worry.   C. That's OK. D. Of course ,I can

Make a list of the things you want to buy. ________, you will surely forget some of them.

A. Anyway      B. However       C. Otherwise           D. Therefore

— Make sure all the lights ______ when you leave the room.

— OK, I will.

A．turn on           B．are turn on        C．are turned off      D．turn off