The number of the students is_________ rapidly in our school.
Though he have been here for several weeks, he still couldn't —_________ to the life here.
— Michael was late for Mr Smith's oral class this morning, —_________? As far as I know, he never came late for class.
It's the sort of work that _________ a high level of concentration.
He spoke for quite a long time, but he threw no _________ on themain point.
I have many friends, some _________ are businessmen.