5. 答案

　　B

　　解析

　　推理判断题。由第五段中的Research has proved what’s true today often is overturned tomorrow, and what’s rejected today may be accepted tomorrow可知，今天证明是正确的东西也许明天就会被颠覆，今天被拒绝的东西也许明天就会被接受。因此，我们对待科学的态度应该是批判性的。故选B项。

　　Ⅲ.语法填空

　　At high school, students get into the thick of exam season. Stress can build ___1___ before they even have a chance to realize it. And besides having ill effects on health, this can also result in ___2___(poor)grades — leading to even more stress.

　　Here are some specific ___3___(suggest) as to how to ready yourself for exams.

　　To process what it is learning, the brain needs enough sleep. It ___4___(connect) to your ability to recall information and do higher-level thinking and problem solving. It is just as important to prepare your body for recalling information during exams ___5___ it is to know the course information.

　　Instead of ___6___(hit) the books right away, take a break and re-charge your mind. Go for a run, or call a friend and tell them you are ___7___(upset). ___8___(prepare) your body and mind for the next wave of intense academic pressure might just result in a better grade.

　　Staying hunched over a desk for hours on end won’t ___9___ your body, or your mind, any favours. Stand up and stretch, or walk around, for five minutes once an hour — and yes, set an alarm ___10___(remind)yourself to do so.

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