题目内容

___ you take an active part in physical activity be able to keep fit and stay healthy

A.
Only if; you will
B.
Only if; will you
C.
Unless; you will
D.
Unless; will you

B
试题分析：考查倒装句：句意：只有你积极的参加体育活动，你才能保持健康。Only后面接状语从句的时候，主句应该用部分倒装，助动词will放在主语前面，选B。
考点：考查倒装句

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Our phones will be so smart in 10 years’ time that they’ll know everything about our situation and warn us when something needs our attention. This is the top prediction of both Nokia and Google. They predict that our cars and home appliances will be able to communicate with our mobile. For example, fridges will tell your mobile to tell you to pick up milk on the way back from work. While driving, your mobile will suggest that you take a different route because there’s a road accident up ahead.

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A. a lead-in B. a conclusion C. a summary D. a supporting fact

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_________ you take an active part in physical activity ______ be able to keep fit and stay healthy

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___ you take an active part in physical activity be able to keep fit and stay healthy