2. 外语
  3. The situation comedy has proved to a remarkably durable commercial television format.

The situation comedy has proved to a remarkably durable commercial television format.

admin2018-01-28  60
问题 The situation comedy has proved to a remarkably durable commercial television format.
选项
答案to∧—be
解析 译文：情景喜剧已经被证明是一种相当持久的商业电视形式。
分析：考查习语。“prove to be+名词”是固定结构，表示“证明是……”，此处缺be。
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