1.Needlepoint has always been an elegant and costly form of embroidery.
(A) expensive adj. 昂贵的；花钱的
(B) beautiful adj. 美丽的
(C) popular adj. 流行的，通俗的；受欢迎的；大众的；普及的

2.Crayfish,small freshwater crustaceans similar to lobsters,are consumed by inhabitants of the Mississippi River Basin.
(A) bred vt. 繁殖；饲养；养育，教育；引起
(B) caught v. 捕捉（catch的过去分词）
(C) eaten v. 吃（eat的过去分词）

3.Originally,a hallmark was a mark stamped on gold to show that the gold conformed to official standards.
(A) was exempt form  是免税的形式
(B) fell short of  没打中目标，不够长
(C) met v. 遇见（meet的过去式和过去分词）

4.In 1963 Maria Mayer was awarded the Nobel Prize in physics for her findings on the constituents of the atomic nucleus.
(A) discovery n. 发现，发觉；被发现的事物
(B) components  n. 部件；组件；成份（component复数）
(C) dimensions n. 规模，大小

5.In the United States the judiciary decides whether or not congressional enactments are contrary to the principles of the Constitution.
(A) connected to 与…相连接；连接到…
(B) in favor of 有利于；支持；赞同
(C) in conflict with 和…冲突

6.Goldenrod was once considered to be a leading cause of hay fever,probably because it blooms at the same time as the less conspicuous ragweed.
(A)beautiful adj. 美丽的
(B)controllable adj. 可控制的；可管理的；能操纵的
(C)noticeable adj. 显而易见的，显著的；值得注意的

7.Congressman Sam Rayburn's 25 consecutive terms in the House of Representatives marked one of the longest tenures of any representative in United States history.
(A)successive adj. 连续的；继承的；依次的；接替的
(B)prolonged adj. 延长的；拖延的；持续很久的
(C)elected  v. （进行）选举( elect的过去式和过去分词 )；推举；选择；决定（做某事）

答案：ACCB CCA

详解：

costly
adj. 昂贵的；代价高的
It has been rather costly to install the machinery, but it should pay off in the long run.
安装这套机械代价很高，但从长远来看它会赚钱的。

consumed
adj. 充满的；对…着迷的
We consumed much time and energy in writing this book.  
我们写这本书消耗了很多时间和精力。

conformed
同形的；紧贴的
This way metrics from all divisions can be compared through the conformed product data. 
这样，来自所有分支机构的指标才能通过统一的产品数据进行比较。

constituents
n. 成分（constituent的复数）
“I am one of my constituents,” a lawmaker tells Wiseman in the film. 
一名议员在影片中对怀斯曼说："我是我这里的选民之一。"

contrary
adj. 相反的；对立的
The plane is flying a contrary direction. 
飞机向相反的方向飞去。

conspicuous
adj. 显著的；显而易见的
She is a conspicuous figure. 
她是个引人注目的人物。

consecutive
adj. 连贯的；连续不断的
Two consecutive tasks in a business model may use different business items as the output and input. 
业务模型中的两个连续任务可以使用不同的业务项作为输出和输入。