Discontent with the cost and (sometimes) impersonal delivery of health care (has fueled) growth in (alternative) medicine, now a

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问题 Discontent with the cost and (sometimes) impersonal delivery of health care (has fueled) growth in (alternative) medicine, now a ($14 billions-a-year) industry.

选项 A、sometimes
B、has fueled
C、alterntive
D、$14 billions-a-year

答案B改为have fueled

解析 句子主语是discontent和impersonal delivery of health care,谓语动词应用复数形式。
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