Unit 4 may might could ...

Some people think that I ............... be crazy to do the job I do.

• must

• could

I .................... a safer way to earn a living, but when I'm hundreds of feet in the air, looking down at the beautiful view, I know it was the right choice.

• could have chosen

• must have chosen

Cleaning the windows of skyscrapers .............. like a difficult and dangerous job, but for me it's fun and enjoyable,.

• may have seemed

• may seem

It ..................... much more dangerous in the past, but nowadays many safety measures are taken to make sure that window cleaners are safe.

• might have been

• can't have been

People often tell me: " it .................. be that perfect." Isn't it tiring?

• mustn't

• can't

What does the sentence mean?

Jack must be good at his job, because he got a pay rise.

• Jack has to be good at his job.

• I believe Jack is good at his job.

She can't be the manager of the company. Look at how young he is.

• I'm sure she is't the manager.

• She isn't able to be the manager.

Learning a foreign language may/might/could help you get a better job.

• It is likely to happen.

• It will certainly happen.

Brad's late. He may/might have had an accident. Let's call him.

• Brad definitely had an accident.

• It is possible that Brad had an accident.

Without my GPS, I could have got lost in the mountains.

• I was able to get lost.

• There was a possibility I would get lost, but I didn't.