情景问答。
There are always ______traffic lights. A．oneB．twoC．three
Yellow light means “______”． A．Stop B．GoC．Wait
Drivers drive ______the right side in China. A．inB．onC．from
______ I go home by bus. A．SometimeB．Some time C．Sometimes
—How ______you go to Canada? —By plane. A．doB．isC．are
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