Thanks to the old man’s hard work, a lot of _____ has been covered with green trees.
| A．the hills | B．hills | C．the hill | D．hill |
Did John ____ the general cleaning yesterday afternoon?
| A．join | B．attend | C．take | D．take part in |
He was educated at a famous university, _____ he went abroad and settled there.
| A．after that | B．after which | C．in which | D．in that |
The 29th Olympic Games ____ in Beijing in 2008.
| A．was held | B．will be held | C．has been held | D．is being held |
The flowers don’t need too much water; you can just water them _____.
| A．each other day | B．every other day | C．each of two days | D．every of two days |
At ____ present we are going through a hard time, but I’m sure ____ things will get better in the near future.
| A．the; the | B．the; 不填 | C．不填; the | D．不填; 不填 |