根据提示写出单词。(1)________ ________ (慢下来)at a yellow light.(2)Mike ________to the bookstore________ ________ .(步行去)(3)I go to Beijing________ ________.(乘火车)(4)We go to Xi’an ________(乘飞机)on holidays.(5)________ and ________ (停下来等待)at a red light.
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