I did not give offence to you ___________—Forget it Let’s make up

Scientists are convinced— the positiveeffect of laughter___ physical and mental health．

Please tell me how long the meeting has _________.

It was at the very beginning____ Mr Smith made adecision ___we should send for a doctor

_________ is your home from your school? –It is onlyfifteen minutes by bike.A．How far