I am late for office.I ____ take a cab (may/must) We____ buy this music compact disc. We have a copy at home(might not/must not)

I am late for office.I ____ take a cab (may/must) We____ buy this mu

1.	I am late for office.I ____ take a cab (may/must) We____ buy this music compact disc. We have a copy at home(might not/must not)
Answer» mustmust not LET me KNOW if it helpsthank you