---Sorry. I must be off. ---How nice it would be if you_____a bit longer!

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running; can run; may to run ; must running ; will

Must; can’t May; must Can; mustn’t Can’t; can

It doesn't matter Don't mention it Catch you later Everything is fine

It doesn’t matter Don’t mention it Catch you later Everything is fine

should should have must must have

You must take charge of it. Wait for your punishment. I’d like a refund, pleasE. I won’t agree with that.

No, couldn’t Sorry, can’t Sure, can Sorry, couldn’t

must have fallen asleep must fall asleep can’t been asleep must be asleep

must be cleaned must be cleaning must cleaned must clean

hit knocked struck drew

So long Walk slowly Be careful Take your time

Yes, I agree Yes, you are quite right I’m sorry to hear that I’m feeling sick

I must be sleep at that moment. I must have slept at that moment. I must have been asleep at that moment. I must have fallen asleep at that moment.

It doesn’t matter Don’t mention it Catch you later Everything is fine

Must; can May; must Must; must May; may

Sorry Thank you By the way Don't worry

Thank you Don’t worry I’m sorry for that Take care

stay would stay stayed have stayed

So long Walk slowly Be careful Take your time