The doctor warned him that his __________ chest pain might turn chronic if not t

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问题 The doctor warned him that his __________ chest pain might turn chronic if not treated in time.

选项 A、perpetual
B、persistent
C、eternal
D、periodic

答案 C

解析 医生警告他说,时而发生的胸部疼痛如果不及时医治可能会变成慢性的疾病。本题是考查形容词的词义辨析。perpetual“永恒的;持续的,不间断的”,多修饰动作性名词,如 perpetual complaints;persistent“坚持的,不屈不挠的”;eternal“永恒的”,含褒义;periodic“定期的,周期性的,时而发生的”。
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