The boy was walking down the street when a UFO .——青夏教育精英家教网—

摘要：The boy was walking down the street when a UFO .

网址：http://m.1010jiajiao.com/timu3_id_2796801[举报]

用动词的正确时态填空

The boy was walking down the street when a UFO ________ (land) .

用所给动词的正确形式填空.

The boy was walking down the street when a UFO ________(land)

用所给动词的正确形式填空.

The boy was walking down the street when a UFO ________(land)

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