. ___ to nuclear radiation, even for a short time may produce variants(变异体)of genes in human bodies.
Tom was about to close the windows _____his attention was caught by a bird.
---- Would you please ______ the form for me? ------ _____________.
Little ______ that we were watching his every move, so he seemed to be going his own way in this business.
Just use this room for the time being, and we’ll offer you a larger one _____ it becomes available.
-----I prefer shutting myself in and listening to music all day on Sundays. ------ That’s _____ I don’t agree. You should have a more active life.