答案:D
解析:
Choice (D) is correct. It avoids the error of the original by using a singular verb, "includes," to agree with the singular noun, "variety," and by eliminating the unnecessary pronoun "it."
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答案:D
解析:
Choice (D) is correct. It avoids the error of the original by using a singular verb, "includes," to agree with the singular noun, "variety," and by eliminating the unnecessary pronoun "it."