2. 外语
  3. A robot may______an action such as paint spraying by guiding its hand through the movements.

A robot may______an action such as paint spraying by guiding its hand through the movements.

admin2019-07-01  50
问题 A robot may______an action such as paint spraying by guiding its hand through the movements.
选项 A、is taught
B、taught
C、been taught
D、be taught
答案D
解析 The sentence needs a passive-voice verb; be taught is the correct form after the modal may.
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托福（TOEFL）

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