1. As everyone knows, the exchange ________ fluctuates almost daily.
A.ration
B.ratio
C.rate
D.interest
2. As a matter of rule, the scrap value of a vessel can hardly be at ________ with the sound value.
A. par
B.bearish
C.collapse
D.rally
3. As a salesman, he works on a (an ________ basis, taking 10% of everything he sells.
A.income
B. commission
C.salary
D.pension
4. As all of us know, color-blind people often find it difficult to ________ between blue and green.
A. separate
B.distinguish
C.compare
D.contrast
5. As a defense against air-pollution damage, many plants and animals_________ a substance to absorb harmful chemicals.
A.relieve
B. release
C.dismiss
D.disclose
6 As far as the rank of position is concerned, an associate professor is ________to a professor, though they are almost equally knowledgeable.
A.attached
B.subsidiary
C.previous
D.inferior
7. As I was just getting familiar with this job, 1 had_________ to ask my boss.
A.many
B.most
C.much
D.more
8. As soon as it started to rain we turned round and _________ home.
A.made for
B.called for
C.cared for
D.searched for
9. As scheduled, the communications satellite went into _________ round the earth.
A.circle
B.orbit
C.path
D.course
10. As is well-known, knowledge is the __________condition for expansion of mind.
A. indispensable
B.indefinite
C.inevitable
D.impossible
参考答案及解析:
1. C解析:rate的意思是“比率;速度”;exchange rate是固定的搭配，意思是“兑换率”;ratio的意思是“定量配给”;ratio的意思是“比，比率”，表示两个量之间的关系。例如：Men outnumber women here in the ratio of three to one.此地男子数量以三比一超过女子。The ratio of 1 to 5 and 20 to 100 are the same.1与5之比和20与100之比相同。interest的意思是“利息”。
2.A解析: par 的意思是“等价”;bearish的意思是“看跌的”;collapse的意思是“暴跌”;rally的意思是“回升”。
3.B解析: commission的意思是“佣金，回扣”它是一个经济词语;income 的意思是“收入，所得”;salary“(按月领取的)薪水”; pension的意思是“养老金，退休金”。
4.B解析: distinguish的意思是“别，区别”，经常用于distinguish one thing from the other 和distinguish between A and B结构中;separate的意思是“分离，分开，隔离”，常和from连用;compare的意思是“比较，比喻”，可用于compare…with…结构中，意思是“与……相比”;contrast 的意思是“(使)对比，(使)对照”，常用在“in contrast to”的结构中，意为“与……相对照”
5.B解析:release的意思是“释放，解除”;relieve的意思是“减轻，安慰，解除”;dismiss的意思是“解雇，开除”;disclose的意思是“揭发，揭露”。
6.D解析:inferior的意思是“地位较低的，地位较差的”，这个词源于丁文，有比较意义，后跟介词to引导出比较对象;attached的意思是“附上……的，连接的”; subsidiary的意思是“辅助的，附属的;次要的”;previous的意思是“先前的，以前的”;
7.C解析:have much to do意为“有许多事情要做”;many作名词时是“许多个;许多人”; most是many/much的最高级，move是many/much的比较级。
8. A解析: make for 的意思是“朝……前进，前往”;call for 的意思是“要求”;care for的意思是“照顾，照料”;searched for 的意思是“寻找，寻求”。
9. B解析:orbit的意思是“轨道”;circle的意思是“圆圈”;path的意思是“路线”;course的意思是“道路，路线”。
10. A解析:indispensable的意思是“不可缺少的，必须的”;indefinite的意思是“不确定的，模糊的，无限的”;inevitable的意思是“不可避免的”;impossible的意思是“不可能的”
