应该选D,这里的“it”是一个形式主语,真正主语在“that eating vegetable in childhood helps to protect you against serious illnesses in later life”这个.
为了句子美观,上口,不头重脚轻,用形式主语“it”.
应该选D,这里的“it”是一个形式主语,真正主语在“that eating vegetable in childhood helps to protect you against serious illnesses in later life”这个.
为了句子美观,上口,不头重脚轻,用形式主语“it”.