—Where does your sister work, Jack? —She works in a_______ . A. shop of cloth B. cloth’s shop C. shop with clothes D. clothes shop D 答案:D 有些考生会因为对名词作定语的用法运用不当而错选B。其实,clothes服装只有复数形式,而单数形式布店应用shop for cloth或cloth shop,因此,根据语境可知将方程x-2y=4变形成用x的代数式表示y,则y=x-42x-42.