It is reported that DNA tests put death penalty under fire. The issue of wrongful convictions does not (47) just to cases that pre-date DNA testing. A growing scandal in Texas (48) as a reminder that genetic tests can be reliable if only those who are carrying them out are reliable. On 4 January, a report was published on the Houston Police Department’s (49) laboratory. The DNA unit of the Texas lab was closed in 2002, after a series of (50) by local television news station KHOU. Now, an independent investigation, which has looked at 1,100 cases so far, (51) the lab with problems including contamination of samples, misrepresentation of (52) in court and failure to use controls. In two cases, one of which put a man on death row, a clear absence of the (53) ’s genetic markers in a sample was called "inconclusive" and not reported.
Investigators (54) lack of funding and incompetent management, among other factors. "The complete lack of outside scrutiny (详细的检查) of the crime lab’s operations, procedures, and reporting of results allowed serious deficiencies.., to become so egregious (惊人) that analysts in the lab simply had now (55) on how bad their practices were," the report reads. DNA analyzed at the lab is being (56) , and at least one person has been freed.
A) serves I) accuses
B) retested J) blamed
C) numbers K) considers
D) exposes L) perspective
E) statistics M) relate
F) crimeN) apply
G) charges O) interviews
H) suspect
参考答案：A
解析：此处应选择一个动词。根据前面的主语a growing scandal和全文的时态，可判断此处应选择一个与第三人称单数形式对应的动词，选项中有六个备选，根据上下文的意思排除其他选项，剩下K)considers和A)serves，两个都可与as搭配。但consider为及物动词，主动形式使用时后面必须有宾语，所以此处选择serve，serve as意思是“起到…作用”。答案为A)serves。本句意为“德克萨斯州不断扩散的一个丑闻起到了警示的作用”。