问题：
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
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 |
参考答案：