TV stations always operate at the highest sound level.

　　Their sound levels are kept around peak level.

　　Their sound levels are kept in the middle frequency rarges.

　　Unlike regular programs their intensity of sound varies over a wide range.

　　。命题者给出的B答案中，只是对however后原句进行了词语和句型的转换，详析见《分册》P16页例8答案。)

　　5、复杂句常考

　　复杂句常是命题者出题之处，包括同位语、插入语、定语、长句后半句，从句、不定式、副词等，命题者主要考查考生对句子之间指代关系。文章段落之间关系的理解，常以逻辑推理题型出现，包括少量其它题型。

　　例1. As families move away from their stable community, their friends of many years, their extended family relationships, the informals flow of in formation is cut off, and with it the confidence that information will be available when needed and will be trustworthy and reliable.

　　Q：The word it most probably refers to ________ .

　　the lack of stable communities.

　　The breakdown of informal imformation channels.

　　The increased mobility of families

　　The growing number of people moving from place to place.

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