136. achieving a high degree of proficiency in english as a foreign language is not a mysterious _____ without scientific basis.
a. process b. practice c. procedure d. program

[答案]a. process.来源：www.gzu521.com
[注释]process(=connected series of actions, or series of operations) 过程：by what process is cloth made form wool?(经过什么过程羊毛织成呢料？)practice(=the doing of something of, performance or repeated exercise, etc.)实习，练习；开业: she is doing her practice at the piano.(她在练习弹钢琴。)procedure(=the regular order of doing things)程序：the usual procedure at a meeting(开会的通常程序)。program(=plan of what is to be done or list of items or events)课程，计划，大纲：what is the program for tomorrow ?(明天上什么课?)

137. i must go now. _____, if you want that book i'll bring it next time.
a. incidentally b. accidentally
c. occasionally d. subsequently

[答案]a. incidentally.来源：www.gzu521.com
[注释]incidentally(=by the way)附带地，顺便：fred said, incidentally, that he had no dinner.(顺便提一下，福来德那时说，他还没吃晚饭。)accidentally(=by chance)偶然地：i met with an old friend of mine accidentally last week.(上星期我偶然碰到一位老朋友。)occasionally (=from time to time, not regularly)不时地，偶尔：we get visitors here occasionally.(我们偶尔在此接游客。)subsequently(=afterwards, later) at first we thought we would go; but subsequently we learned we were needed at home.(起初,我们想离开；但随后我们得知家里需要我们。)

138. a completely new situation is likely to _____ when the school leaving age is raised to 16.
a. arouse b. rise c. arise d. abide

[答案]c. arise.
[注释]arise(=come into being, appear, happen)产生，发生：difficulties will arise as we do the work.(我们做这项工作时将会发生困难。)
arouse 唤起，激起，唤醒；rise 上升;abide (by)遵守。
本题译文：当中学毕业年龄上升到16岁时，很可能产生完全新的情况。

139. the illness from which mary is suffering has now been _____ as hepatitis (肝炎).
a. diagnosed b. determined c. deduced d. discovered

[答案]a. diagnosed.来源：www.gzu521.com
[注释]diagnose...as 把......诊断为......。
本题译文：玛丽的病现已诊断为肝炎。

140. these continual _____ in temperature make it impossible to decide what to wear.
a. alterations b. vibrations c. waves d. fluctuations

[答案]d. fluctuations.
[注释]fluctuations波动；waves波浪；alterations(部分)改变，变更；vibrations(物理学上)振动。