Modals for Certainty May Might Can't Must

My passport ___ be in at home. I’ve already looked inside my bag three times.

• must

• may

• can’t

I’m sure that’s Ellen’s sister. They look so alike.

That __________ Ellen’s sister. They look so alike.

• Must be

• Might be

• May be

George ordered a large hamburger with everything on it except onions. He _______________ like onions.

• might not

• might'nt

• should

• can

Bob usually drives his car to work, but today he got on the bus. Something _______________ wrong with his car.

• may be

• must be

• should be

• can't be

Glen's wife is Japanese. There is a picture of a Japanese woman on his desk. That ____________ his wife.

• can't be

• should be

• must be

• might not

‘Is that Mr Tanaka?’

‘No, that ____ be him because Mr. Tanaka wears glasses.’

• must

• can’t

• mustn’t

"I’m sure that’s not Jack’s car. His car is red".

It ____________ be Jack. His car is red

• Can't

• Might not

• May not

Sam is usually very friendly, but he is different today. I think he ______________ worried about something.

• might be

• must be

• can't

• should

"Someone is at the door. It _________ be Kate. She said she would probably come by sometime this week."

• must

• can't

• might

• should

Is Stephanie coming over tonight?

- I’m not sure. She ___________ .

• might be

• must be

• should be

• can't be