4B STB p. 36

A: Do you know where my smartphone is?

B: Yes, it is in the bathroom. You _________ have left it there this morning

• Couldn't

• Would

• Must

• Haven't

A: I'm finished

B: You _____________ be finished already!

• Could

• Might

• Have not

• Couldn't

A: Did I tell you about my friend Roger

B: I think you _________ have told me, but I've forgotten. Tell me again

• Can't

• Should

• Might

• Would

A: I can't stop thinking about where he might be.

B: Yes, anything _________ have happened to him!

• Could

• Must

• Has

• Should

A: My ex-boyfriend starred in a movie once

B: Really? With looks like his, it ________ have been Planet of the Apes.

• Must

• May

• Would

• To

A: I'm sorry, but I think I _________ have been a little impolite to you yesterday.

B: Impolite? I thought you were really rude actually.

• Couldn't

• Should

• Shouldn't

• May