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Task 1. Choose the more likely answer. If they are equally likely, circle both.

1.Now that it has been eradicated, doctors needn't / don't need to vaccinate against smallpox.

2.To get to Peru, I must / had to borrow money from my sister.

3.You must / have to come and visit us soon. It would be so nice to see you again.

4.The game should / can be played by up to six people.' (from the instructions for a board game)

5.I had some free time yesterday, so I could / was able to write a few letters.

6.By the end of the day I can/may have finished painting the walls. Tomorrow I'll start on the ceiling.

7.They might/could have chosen anyone for the job, but they picked me.

8.I would/ used to like going to pop concerts when I was a teenager.

9.It’s absolutely necessary, we should/ must consult more closely with the unions.

10.Lucy can’t /must have heard the bad news. She looks so happy.


Task 2. Correct these sentences where necessary, or put a √.

1.Business letters had better be brief and to the point.

2.I had to work late on Friday, so my mother would pick up Sue from school.

3.I think I saw her go out, so she mightn't be at home.

4.It mightn't be true. There must be some mistake.

5.I need hardly to tell you how important it is that we win this order.

6.We mustn't allow our production rates to drop.

7.As you are feeling ill, you'd better not go to work.

8.When I had problems with my homework last night, my father would do it for me.

9.Five years ago, the children in this school would help to plant all the trees you see before you.

10.I thought they were on holiday - but I can be wrong, of course.