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16.The reporter said that the UFO           from the east to the west when he saw it.(  )
A.was travellingB.travelled
C.had been travellingD.was to travel

分析 记者报道说,当他看见UFO的时候,它正在由东向西飞行.

解答 答案A.
B项"一般过去时"表示发生在过去的动作;C项"过去完成进行时"表示持续到过去某时的一个动作;D项"过去将来时"表示从过去某时看来将要发生的动作或存在状态;A项"过去进行时"表示在过去某一时刻或某一段时间内发生的动作;根据题干中的"when he saw it"可知,在过去的某个时刻,即"我看见的时候",所发生的事情,在那个时刻UFO正在由东向西飞行,所以应该用过去进行时,故选A.

点评 本题考查时态辨析.解答此类题目首先要读懂句意,捕捉信息,理解情境,综合运用,灵活答题,结合具体的语境,选出正确的时态.在平时学习的过程中,对每一种时态的用法要掌握到位.

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