单选题
Since the {{U}} {{U}} 1 {{/U}}
{{/U}}of the National Environmental Policies Act in 1969, the United States
Congress, legislature at the federal level, has {{U}} {{U}} 2
{{/U}} {{/U}}a series of laws designed to prevent the air and water pollution
and to {{U}} {{U}} 3 {{/U}} {{/U}}noise. At the same time,
legislatures at the state {{U}} {{U}} 4 {{/U}} {{/U}}have also
been active in this area, and many states have laws that are similar to the
federal laws. {{U}} {{U}} 5 {{/U}} {{/U}},a state law must not
conflict with a federal {{U}} {{U}} 6 {{/U}} {{/U}}or {{U}}
{{U}} 7 {{/U}} {{/U}}an unreasonable burden on interstate
commerce. The city of Burbank in California adopted an
ordinance {{U}} {{U}} 8 {{/U}} {{/U}}the nighttime takeoffs of
jet aircraft between 10 p.m and 7 a.m. Lockheed owned and operated the Burbank
Airport. It {{U}} {{U}} 9 {{/U}} {{/U}}Brubank to prevent the
enforcement of the ordinance. The judgment is {{U}}
{{U}} 10 {{/U}} {{/U}}Lockheed. The federal government of the United
States has passed laws {{U}} {{U}} 11 {{/U}} {{/U}}aviation and
noise in the federal Aviation Act of 1958 and the Noise Control Act of ]972.
Such legislation preempted the field and {{U}} {{U}} 12 {{/U}}
{{/U}}state action, because {{U}} {{U}} 13 {{/U}}
{{/U}}regulations would place an unreasonable burden on interstate commerce. If
each airport had its own landing time {{U}} {{U}} 14 {{/U}}
{{/U}}, it would be very difficult to plan flights. Moreover the bunching of
flights to {{U}} {{U}} 15 {{/U}} {{/U}}local curfews would
produce even greater noise and would increase the danger of {{U}} {{U}}
16 {{/U}} {{/U}}by increasing traffic {{U}} {{U}} 17
{{/U}} {{/U}}. From the nature of aviation {{U}} {{U}} 18
{{/U}} {{/U}}, a single national control was essential. As a local regulation,
the {{U}} {{U}} 19 {{/U}} {{/U}}prohibiting nighttime takeoffs
adopted by the City of Burbank was {{U}} {{U}} 20 {{/U}}
{{/U}}declared illegal.
单选题
A. enforcement B. enhancementC. enjoyment D. engagement
【答案解析】[解析] 本题考查上下文理解。这句的意思是：同时，州一级的立法机关在这一方面也很活跃，许多州都有与联邦法律相似的法律。这里出现的legislatures at the state ______ 实际上与前面出现的一句话是互相呼应的，前面的那句话是：legislature at the federal level前面讲的是联邦级的立法机关，后面紧接着讲的是州一级的立法机关。发现这一点，就很容易解题了。如果忽略这一点，还可以通过意思来判断，level表示级别，等级。