The problem with being a time waster is _____the online game playing often spills over into the periods of time that should be productive

_____ the students in our class is 45 and _____ them study hard. [ ]

－How did youfind the film－It was a(n) one,no better than the one we saw last week.

This was the best model of a radio set the factory produced in 1970.

There are more opportunities fordisabled people to make______ contribution to______ society