请问ppreview2中的125，答案为d

125. The great bulk of business transactions in

the United States is handled by means of

credit instruments rather currency.

请问bulk这个词的用法，如果它做主语，谓语只能用单数形式？谓语单复数应与bulk一致，而与transactions这个复述形式无关？

59. Virtually the same array of mammals _________ in the

hills surrounding Los Angeles today occupied this

area in the late Pleistocene era.

that they live

lives

that lives

that living

另外，类似的，59。是否若主语中的名词有of短语修饰，应该是of前的那个名词决定谓语的单复数？唉，总是搞不懂到底是of前的名词为中心词，还是of后的是。