Madame Curie and her husband continued to work __ all the discomforts.
With drink and food ____, the prisoner had to walk out of the cave where he was hiding.
Not ______that is best for nature is good for people.A anything B nothing C something D everything
The bell __ the end of the period rang, __our heated discussion.
_______cloning human embryos is not legal in many countries, some scientists are already pushing ahead with research in order to produce a cloned human baby.
________ the programme, they have to stay there for another two weeks.A Not completing B Not completed C Not having completed D Having not completed