_______ a small number of Australians are bitten by spiders each year, most recover without any medical treatment.
A．While B．Unless C．When D．Because
This morning I saw an old friend of mine in the street by ______.
A．event B．accident C．affair D．matter
Everyone should _______________ the environment.
A．make a contribution to protect B．make contribution to protecting
C．contribute in protecting D．make contributions to protecting
—Listen, Lily is playing the piano!
—Wow, how sweet the music ______!
A．is heard B．hears C．is sounding D．sounds
________ tomorrow, I would take a bus to school.
A．If it rains B．If it was to rain
C．Should it rain D．Rained it
Can you move the desk a little further, for it most of the office？
A．takes up B．takes off C．takes in D．take on
