Question

There are some health problems that, if _______ in time, can become bigger ones later on.

A.not treated B.not being treated

C.not to be treated D.not having been treated

Answer

A

【解析】

考查状语从句的省略。句意：如果不及时治疗，有些健康问题可能会在以后变成更大的问题。在状语从句中，如果从句的主语和主句的主语一致且从句的谓语含有 be 动词的某种形式（ am/ is / are / was /were ），可同时省略从句的主语和 be 动词的某种形式。例如when，while 引导的时间状语从句以及if，unless，once 引导的条件状语从句等。例句：When （it is）heated to 100℃, water will turn into vapor. 水加热到 100 摄氏度就会变成蒸汽。If （it is）properly treated, waste will do no harm to the environment. 如果废物妥善处理，就不会对环境有危害。本题是if引导的条件状语从句的省略，完整的句子为：There are some health problems that, if they are not treated in time, can become bigger ones later on.结合以上分析，故选A。