_____ you eat the correct foods _____ be able to keep fit and stay healthy.
A．Only if; will youB．Only if; you will C．Unless; will youD．Unless; you will
A
考查倒裝句。Only放在句首，強(qiáng)調(diào)狀語的時(shí)候，后面的主句使用部分倒裝。本題only放在句首，強(qiáng)調(diào)條件句if you eat the correct foods。句意：只有你吃合適的食物，你才能保持健康。
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