Never form the habit of smoking because it ______ human beings.
A．does harm withB．is harmful toC．is harm forD．does harmful to
B
短語辨析. be harmful to 對……有傷害的,是形容詞詞組結(jié)構(gòu);do harm to 造成危害。 是動詞性結(jié)構(gòu)。根據(jù)題意,永遠不要養(yǎng)成吸煙的習(xí)慣,因為它對人體有害.選B.
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