Each of the following sentences has four underlined parts. These parts are labeled [A], [B], [C], and [D]. Identify the part of sentence that is incorrect and put your choice in the ANSWER SHEET. Then, without altering the meaning of the sentence, write down your correction on the line in the ANSWER SHEET. (10 points)
61.These is a [A] delicate balance of nature which [B] many square miles of ocean and vegetation and clean air are needed [C] to maintain only a relatively few [D] human beings.（[B] in which）
62.The idea that [A] learning is a [B] lifelong process has expressed [C] by philosophers and educationalists throughout [D] the centuries.（[C] has been expressed）
63.Nobody beside [A] little [B] children thinks [C] that a trip by bus is exciting [D].（[A] except/but）
64.Just outside [A] the ruins are [B] a magnificent [C] building surrounded [D] by tall trees.（[B] is）
65.In the teaching of [A] mathematics, the way of instruction is generally traditional, with [B] teachers presenting formal [C] lectures and students take [D] notes.（[D] taking）
66.The teacher asked them [A] who had completed [B] their tests to leave [C] the room as quietly [D] as possible.（[A] those）
67.He wanted more out of life [A], not just working at [B] high-paid [C] jobs or spending nights on the streets playing games [D].（[C] highly-paid）
68.Man [A] has used metals for centuries in gradual [B] in creasing quantities, but it was not until the Industrial Revolution that [C] they came to be employed [D] in real vast quantities.（[B] gradually）
69.If you want your film to properly process [A], you’ll have to wait and pick it up [B] on Friday, which [C] is [D] the day after tomorrow.（[A] be properly processed）
70.A man cannot [A] be really happy if that [B] he enjoys doing is ignored [C] by society as of [D] no value or importance.（[B] what）
