Sugar______naturally in fruit, so eating fruit can add to the contents of sugar inside our body.
A．happensB．occursC．a(chǎn)ppearsD．forms
B
 occur此處意思為“存在于；出現(xiàn)在”，句意：水果天然含糖分,因此多吃水果能夠增加體內(nèi)糖分的含量。
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