has been done to make our school more beautiful.A. ManyB. MuchC. A lot ofD. A few

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A. Many
(答案→)B. Much
C. A lot of
D. A few
解析：考查主谓一致。根据横线后的has说明主语是不可数名词。故AD错误。AD都指代可数名词复数。C选项是形容词短语，修饰可数名词复数。不能单独做主语，故B正确。Much指代不可数名词在句中做主语，谓语动词用单数。