题目内容
【题目】Tourists are required_______ their cars outside the National Park and take the cable car
A. park B. parking C. parked D. to park
【答案】D
【解析】句意:游客被要求把他们的车停在自然公园外面,然后乘电车。根据park停车,动词;be required to do sth被要求做某事;故选D
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