Choose the correct options

John might join the school basketball team.

• It is possible that he will.
• It is certain that he will.

You needn't have bought me a present.

• You bought me a present.
• You didn't buy me a present.

Nancy can't be at the cinema.

• I think Nancy isn't at the cinema.
• I'm sure Nancy isn't at the cinema.

You can't talk during the study period.

• You are not allowed to talk.
• It isn't necessary to talk.