18.Every boy and every girl as well as some teachers who _________to visit the museum _______asked to be at school gate before 6:00 in the morning.
Our neighbor offered to look after our baby while we were away, ____ was very kind of her.
I was walking in the street yesterday _____ I met with our football coach.
—Jessica is very bright and studies very hard _____.—No wonder she always gets the first place in the examination.
The two top students in Mr. Green’s class competed _____ each other for the highest marks.
It is no use ____ with that mean storekeeper, for he won’t cut down the price.