--It’s reported that scientists have ________ an effective way to deal with H1N1.--Really? That’s great!
The town has _________ population of ten thousand and 80% of _________ population are peasants.
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.