填空题：设等差数列{an}的前n项和为Sn，若a1=-11，a4+a6=-6，则当Sn取

设等差数列{a_n}的前n项和为S_n，若a₁=-11，a₄+a₆=-6，则当S_n取最小值时，n等于（）。

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C 题目分析：考查情态动词。句意：许多人当在车里或船上看书时可能会感觉不适。根据when they read a book in a car or on a boat 当他们在车里或船上读书时，一些人可能...

完形填空。
Books are treasured(财富) because they __1__ us knowledge. Knowledge is important __2__ it enriches our life and brings us __3__. All great men in the history of mankind loved books. It is the knowledge in the books that let them to success. There is no genius without books, __4__ books are the source(来源) of knowledge and knowledge is the source of success. A man is blind and does not know much __5__ he is unable to read. Books brings us pleasure and knowledge. They also enable us to see through the __6__ and to see into the future. Macaulay, the famous historian, once wrote to a little girl, "If anyone would __7__ me the greatest king that every lived with palaces and gardens and fine dinner, and beautiful __8__, and hundreds of servants, on condition(以……为条件) that I should not read books. I would not be a king, I would __9__ like a poor man in a top room with plenty of books rather than a king __10_ did not live to read."
( )1. A. take ( )2. A. Why ( )3. A. happiness ( )4. A. if ( )5. A. what ( )6. A. pass ( )7. A. make ( )8. A. clothing ( )9. A. to be ( )10. A. who	B. carry B. because B. luck B. but B. that B. passing B. choose B. clothes B. to become B. whom	C. fetch C. where C. food C. because C. when C. past C. let C. cloth C. be C. whose	D. bring D. how D. money D. though D. where D. back D. get D. shirts D. becoming D. which