读一读，找出每组中不同类的单词。 （1） ( ) （2）
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I go to school at 7:30 ______ the morning. A.in B.at C.on
The children can get money in ______ envelopes. A. yellow B. blue C. red
My friend, Peter can play _____ football, but he can’t play ____ violin. A. /, the B. the, the C. the, /
People also ______ colourful fireworks at night. A. look B. see C. watch
I usually go to the library ______ Sunday afternoon. A. in B. on C. at
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