到底thatis指的是紧随其后的sugars还是之后的Achocolate呢.
Avoideatingfoodsthatarehighinsimplecarbohydrates,thatis,sugars.Achocolatebarwillfirstgiveyouenergy,butthenitwillleaveyoufeelingevenmoretired.我想问的是:thatis为什么不是thatare.它应该是想引出后面的sugars,但这里的sugars是复数啊谓语应该是are.还是thatis实际是指代后面的achocolate呢.
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