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People today make choices of their diets______ what they believe.
A．based onB．basing onC．a(chǎn)re based onD．being based on
A
考查短語：be based on 以什么為基礎(chǔ)，在這里based on做后置定語，修飾their diets，相當(dāng)于定語從句which are based on，故選A。
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