2. 外语
  3. Nearly unrivaled in their biological diversity, coral reefs provide a host of benefits that includes the supply of protein for p

Nearly unrivaled in their biological diversity, coral reefs provide a host of benefits that includes the supply of protein for p

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问题 Nearly unrivaled in their biological diversity, coral reefs provide a host of benefits that includes the supply of protein for people, protecting shorelines, and they contain biochemical sources for new life-saving medicines.
选项 A、coral reefs provide a host of benefits that includes the supply of protein for people, protecting shorelines,
B、coral reefs provide a host of benefits: they supply people with protein, they protect the shorelines,
C、coral reefs provide a host of benefits that include supplying protein for people, as well as shoreline protection,
D、a coral reef provides a host of benefits; they supply protein for people, the protecting of shorelines,
E、a coral reef provides a host of benefits, including protein for people, protecting shorelines,
答案B
解析 Parallelism; Agreement
When listing several items (here, benefits of coral reefs), they should be expressed in a parallel way, such as by using all noun phrases or all full clauses. Also, pronoun subjects in one clause that refer to the subject of a preceding clause should agree in number.
A The three items after includes are not parallel (the supply; protecting shorelines; they contain).
B Correct. The three items after benefits are parallel (they supply; they protect; they contain)’.The subject of the next clause (they) is correctly plural given that its antecede it is coral reefs.
C The three items after include are not parallel: supplying, shoreline protection, they contain
D The three items after benefits are not parallel (they supply; the protecting of; they contain, and in the next clause they is the incorrect pronoun given that the antecedent here is the singular a coral reef.
E The three items after benefits are not parallel (protein; protecting; they contain), and in the next clause they is the incorrect pronoun given that the antecedent here is the singular a coral reef
The correct answer is B.
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