题目内容
【题目】The movie (is based on/ is basing on) a science fiction.
【答案】is based on
【解析】句意：这部电影是以科幻小说为基础的。固定短语is based on建立在...基础之上，base是及物动词，词组的原型是base sth on sth，故选is based on。
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题目内容
【题目】The movie (is based on/ is basing on) a science fiction.
【答案】is based on
【解析】句意：这部电影是以科幻小说为基础的。固定短语is based on建立在...基础之上，base是及物动词，词组的原型是base sth on sth，故选is based on。