Color TV was first shown in 1929. It took more than two decades, ________,until 1951, for color broadcasts to begin in the USA.A. though B. therefore C. otherwise D. anyway
—I wonder if you could go with me to the supermarket. —Sorry. I _______ my experiment report all the morning and haven’t finished yet.
_______ a small number of Australians are bitten by spiders each year, most recover without any medical treatment.
This morning I saw an old friend of mine in the street by ______.
Everyone should _______________ the environment.
—Listen, Lily is playing the piano! —Wow, how sweet the music ______!