Not until all the fish died in the river, ____ how serious the pollution was.
| A．did the villagers realize | B．the villagers realized |
| C．the villagers did realize | D．didn’t the villagers realize |
With his mother’s good care, the boy is _____ recovering from his heavy cold.
| A．frequently | B．actually | C．fluently | D．gradually |
She was grateful _____ George _____ all _____he had done.
| A．to; for; that | B．to; for; what | C．for; to; that | D．for; to; what |
I asked my boss for a month’s holiday and, _____, she agreed.
| A．what’s more | B．that is to say | C．believe it or not | D．in other words |
She is sure to get the job she wants ----she’s a very _____ person.
| A．stubborn | B．determined | C．concerned | D．reliable |
Hiking is ____ great fun. You will get close to _____ nature and take exercise at the same time.
| A．a; the | B．the; / | C．/; the | D．/; / |