17.) Ninety per cent of all Pacific salmon were caught are sockeye or pink salmon.
原文：All five species of Pacific salmon -- chinook, or king; chum, or dog; coho, or silver; sockeye, or red; and pink, or humpack -- spawn in Alaskan waters, and 90% of all Pacific salmon commercially caught in North America are produced there.
题目当中的关键词 Ninety per cent/Pacific salmon/sockeye/pink salmon都是原文当中的原词，所以如果不理解句子的意思可能会错以为答案是TRUE。但是仔细分析下，原文是由“and”并列起来的复合句，前半句列举了Pacific salmon的五个品种，后半句说北美捕捉到的90%Pacific salmon都产自于阿拉斯加，但是具体这90%是什么品种原文并没有说明，所以答案是NOT GIVEN。
27.) In the first paragraph the writer makes the point that blind people
A. may be interested in studying art.
B. can draw outlines of different objects and surfaces.
C. can recognise conventions such as perspective.
D. can draw accurately.
原文From a number of recent studies, it has become clear that blind people can appreciate the use of outlines and perpectives to describe the arrange-ment of objects and other objects in space.
vi ) Controlling pilots' licences
viii ) Setting rules to weather conditions
F ) The FAA then recognised two types of operating environments. In good meteorological conditions, flying would be permitted under Visual Flight Rules(VFR), which suggests a strong reliance on visual cues to maintain an acceptable level of safety. Poor visibility necessitated a set of Instrumental Flight Rules(IFR), under which the pilot relied on altitude and navigational information provided by the plane's instrument panel to fly safely.
On a clear day, a pilot in controlled airplace can choose a VFR or IFR flight plan, and the FAA regulations were divised in a way which accommodates both VFR and IFR operations in the same airspace. However, a pilot can only choose to fly IFR if they possess an instrument rating which is above and beyond the basic pilot's license that must also be held.