Above one third of the population in Beijing and Shanghai      netizens, but in poorareas, only three or four percent        online.

 Many a student ________ failed in the biology exam，and Tom is the only one of them who ________ decided to give up the course.

Not only the workers but also the machine ____  not there.

An American scientist and writer _______ coming to give us a lecture on English  learning methods when he visits our school.

_____number of the students in our class ______ 40. _______ number of them ______ sporty.