Not until all the fish died in the river how specious the pollution was.
| A．did the villagers realize | B．that the villagers realized |
| C．the villagers did realize | D．didn’t the villagers realize |
The form is said to require __________ in black ink.
| A．filling in |
| B．to be filled |
| C．filling |
| D．to fill in |
To keep healthy ,Mr. Lin __________ climbing as a regular form of exercise after he retired .
| A．took up |
| B．took on |
| C．made up |
| D．made in |
-How shall we spend the holiday?
—Well, I recommend __________
| A．to travel |
| B．traveling |
| C．to traveling |
| D．travel |
If you are hoping to __________ for high education courses in the UK, you can call me or visit our website.
| A．search |
| B．prepare |
| C．apply |
| D．pay |
—What's that terrible noise?
—The neighbors __________ for a party.
| A．have prepared |
| B．are preparing |
| C．was preparing |
| D．will prepare |