III. Complete the following sentences with the correct form of Do or MAKE:

1. He is.....................research in chemistry now.

2. She..................my bed this morning.

3. Have you..................arrangements to sell your house?

4. We have to..................military service in my country.

5. Tom’s mother...........him eat his dinner last evening.

6. We always........................our best.

7. That shop.........................very good business.

8. She always....................fun of me.

9. The principal will.............a speech at the meeting.

10.  Let’s...............a plan.

11.  Who.........................this beautiful blouse?

12.  A computer can..........................simple calculations with lightning speed.

13. I’m going to.......................some reading.