can’t couldhad bettermustn’tmusthave to1) A computer is only a machine, it __________ think for itself.2) In China, you _________ drink alone when you are invited to adinner party.3) The lights are on, David ____________ be at home now.4) You ____________ stay here until I come, or you may get lost.5) I ____________ go to college because it’s my parents’ dream.6) ____________ you please pass me the salt?