Lots of waste has been dumped into the river，which has led to________.
| A．lots of fish having been killed | B．kill lots of fish |
| C．lots of fish being killed | D．lots of fish to kill |
You can’t park here, sir. It is ____ for the ambulances only.
| A．protected | B．reserved | C．saved | D．swapped |
The only existing problem is ____ we can find this special wood in the forest in such a short time.
| A．when | B．where | C．that | D．whether |
The reason why they failed the test was ____ they didn’t sleep at all the night before.
| A．because | B．why | C．that | D．for which |
The nurse was very kind to the boy at first, but finally, her ____ gave out and she lost her temper.
| A．patience | B．violence | C．presence | D．independence |
Lucy was called to ____ her stupid deeds the night before, but she couldn’t remember anything.
A. pay for B. leave for B. account for D. look for