Either you or one of your family members __________the opening ceremony next week. 

Mary is the only one of the girls who _____ often late for school.

--- Lydia, what did our headteacher say just now? --- Every boy and every girl as well as the teachers who       to lead the group       asked to be at the school gate before 6:30 in the morning.

There ______ some sheep and a dog at the foot of the hill.

--- How _____ hours do you sleep a day?--- Well, about eight hours. But how _____ sleep do we students really need?