Which one is less formal

• CAN

• MAY

• COULD

This verb is used to talk about obligations

• MUST

• SHOULD

• COULD

The book is optional. My professor said we could read it if we needed extra credit. But we_______________ read it if we don't want to.

• don't have to
• must not
• cannot

Terry and Frank said they would come over right after work, so they_____________ be here by 6:00.

• have to
• should
• can

The traffic is awful. Geovanna is not here. She ______ be stuck in the traffic

• must

• might

• may

• should

I don't know where Jessica is. She _____ be with her friends

• might

• must

• can't

Michael Jackson ____ sing in Rock Rio. He's dead.

• can't

• must

• might

Open the brackets:

You ____________ (should/ ask) Tim what time the race starts when he called.

• should ask

• should asked

• should have asked

• should have ask

They ____________ (must/lose) the game. She's so upset.

• must have lost

• must lost

• must have lose

You ________ have finished that book! You only bought it yesterday!

• must

• could

• can't

• can