题目内容
Never form the habit of smoking because it ________ human beings.
- A.is harmful with
- B.does harm to
- C.is harm for
- D.does harmful to
B
harm是名词或动词,do harm to对……有害;harmful是形容词;be harmful to对……有害。
harm是名词或动词,do harm to对……有害;harmful是形容词;be harmful to对……有害。
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