— Remember the first time we met?—Of course I do. You __________to the music on the stage.
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
When the boss came in, these workers pretended to________ carefully.