| Somone should prohibit human cloning. | | |
| It would be good to promote human cloning. | | |
| Scientists may use genetic engineering to find a cure for AIDS. | | |
| Maybe they've found a cure for cancer through genetic engineering. | | |
| The law should not let people do certain experiments. | | |
| People should not perform certain experiments. | | |
| It was bad to clone the sheep. | | |
| It may not have been good to clone the sheep. | | |
| Maybe some scientists have already cloned humans but we don't know about it. | | |
| Some scientists want to experiment on human cloning but they don't have permission to do it. | | |