he works seven days a week, and sixof _____ until one o’clock at night.

How much shall I pay for the phone call — You ________. This is free of charge.

ne should learn something about first aid, forevery second will_______in an emergency

Whitney Houston’s sudden death suggests that drug abuse is such a serious problem ______ we should deal with properly

Jack had sent some e-mails, he _______ workingon his project.