1.It has taken many years to adopt internationally recognized standards for the licensing of aircraft pilots.
(A) data (B) criteria (C) committees
2.No form of money has ever proved completely satisfactory in terms of providing a stable measure of value.
(A) an official (B)a useful (C)a fixed
3.The Rio Grande, a river bordering Texas and Mexico, flows 1,800 miles from its source in the state of Colorado to the Gulf of Mexico.
(A) bank (B) mouth (C) beginning
4.Most animal fats are saturated, containing more hydrogen than carbon, and do not spoil as easily as unsaturated fats.
(A) melt (B) get used up (C) go bad
5.The boom in silver production after 1860 spurred the use of innovative machinery in crafting silver flatware and vessels
(A) stimulated (B) allowed (C) required
6.Ravaged by pollution and war, many famous monuments have become eroded and stained.
(A) discolored (B) dismembered (C) discredited
7.Before the first Apollo rocket went to the Moon, a spot for landing the lunar module(登月舱) was carefully chosen.
(A)climate (B)latitude (C)location
答案：BCCCA AC
详解：
1、Criteria
n. 标准，条件(criterion的复数)
The criteria will be different from those that pertain elsewhere.
这里的标准将不同于其他地方适用的标准。
2、a fixed
固定
You should be doing usability testing even if you do not have a fixed laboratory or access to one.
因此，即使你没有或没法找到一个固定的实验室，你也应该进行可用性测试。
3、beginning
n. 开始;起点
v. 开始;创建(begin的ing形式)
This is only the beginning.
这仅仅是开始。
4、go bad
变酸;开始腐坏
And know this - things do go bad from time to time in any relationship.
记住类似的坏事情在任何夫妻关系中都会时不时的发生。
5、stimulated
adj. 受激的
v. 刺激(stimulate的过去式和过去分词)Whatever you are stimulated, you should write it down.
无论是什么激励你的,都要把它写下来。
6、discolored
adj. 脱色的;污染的
v. 使褪色;脱色(discolor的过去分词)
If the film is scratched, attracts dust, or becomes discolored after years or decades in the sun, it could actually lower power output over time.
如果在阳光下经过数年或数十年之后，贴膜出现裂痕、敷灰或者褪色，它实际上可能会降低电力输出。
7、location
n. 位置(形容词locational);地点;外景拍摄场地
This corner would make a good location for a gas station.
这个拐角将是设立一个加油站的好地点。
From:https://www.zgghmh.com/CET-4/20003980.asp