Choose the correct answer to complete the sentences!

1) I ___ understand. Do you?


don't
doesn't


2) We are rich, so we ___ have to work.


doesn't
don't


3) That kind of earthquake ___ happen often.


don't
doesn't

1) I ___ understand. Do you?don't2) We are rich, so we ___ have to work.don't3) That kind of earthquake ___ happen often.doesn't