after two years of study at college his english is still very faulty

after two years of study at college his english is still very faulty

had paid;would speak and write

根据上下文，既然有‘after two years of study at college his english is still very faulty’这一句，就表明文中的he曾经学习过，但其English还是faulty，因此这两个空是对过去的虚拟。 第一个空填 had paid ，第二个空填 could have spoken and wtitten 。
六楼的垃圾有本事你去教啊，有本事出国啊，干嘛在这里。。

pays
will speak and write

had paid could speak and write

楼下的几位都没说对
if he had paid，然后要对应 he would have spoken and written
过去完成时

第一空应该是paid,如果是had paid则意为已经付出(支付),语义中显然不需要强调已经所以过去时就够了.
第二空是虚拟假设所以用would,would后面必须动词原型所以是would speak and write.
话说国内的考题真垃圾..清一色中国式语法还给学生做呢....

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