题目

The scientists predict that if present trends____, women in 400 years will be 2cm shorter and have healthier hearts．          A．will continue     B．continue   C．are continued    D．will be continued 答案：B 解析: （if引导的真实条件状语从句常用一般现在时表示将来的概念，而主句要用将来时。）

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