Daniel is a _____ swimmer and he swims very _____.
Daniel 是一名很棒的游泳者,他游泳游得很好。good 是形容词,修饰名词 swimmer;well 用来修饰动词,故答案为选项A。
Fast food like hamburgers is not _____ food. We should have less of it.
句意:像汉堡包这样的快餐不是健康的食物。我们应该少吃。表示“健康的”要用形容词 healthy。
It's necessary for us _____ English well.
It's+adj.+for sb. to do sth.
我们可用“固定句式法”解答本题。It's+adj.+for sb. to do sth.意为“对于某人来说,做某事是……的”,为固定向式,故选A。句意:对于我们来说,学好英语是有必要的。