Many teachers believe that the responsibilities for learning lie with the student. __71__ a long reading assignment is given, instructors expect students to be familiar with the __72__ in the reading even if they do not discuss it in class or take an examination. The __73__ student is considered to be __74__ who is motivated (激励) to learn for the sake of __75__, not the one interested only in getting high grades. Sometimes homework is returned __76__ brief written comments but without a grade. Even if a grade is not given, the student is __77__ for learning the material assigned. When research is__78__, the professor expects the student to take it actively and to complete it with __79__ guidance. It is the __80__ responsibility to find books, magazines, and articles in the library. Professors do not have the time to explain __81__ a university library works; they expect students, __82__ graduate students, to be able to exhaust the reference __83__ in the library. Professors will help students who need it, but __84__ that their students should not be __85__ dependent on them. In the United States professors have many other duties __86__ teaching, such as administrative or research work. __87__, the time that a professor can spend with student outside of class is __88__. If a student has problems with classroom work, the student should either __89__ a professor during office hour __90__ make an appointment.

　　71. A) If B) Although C) Because D) Since

　　72. A) suggestion B) context C) abstract D) information

　　73. A) poor B) ideal C) average D) disappointed

　　74. A) such B) one C) any D) some

　　75. A) fun B) work C) learning D) prize

　　76. A) by B) in C) for D) with

　　77. A) criticized B) innocent C) responsible D) dismissed

　　78. A) collected B) distributed C) assigned D) finished

　　79. A) maximum B) minimum C) possible D) practical

　　80. A) student’s B) professor’s C) assistant’s D) librarian’s

　　81. A) when B) hat C) why D) how

　　82. A) particularly B) essentially C) obviously D) rarely

　　83. A) selections B) collections C) sources D) origins

　　84. A) hate B) dislike C) like D) prefer

　　85. A) too B) such C) much D) more

　　86. A) but B) except C) with D) besides

　　87. A) However B) Therefore C) Furthermore D) Nevertheless

　　88. A) plentiful B) limited C) irregular D) flexible

　　89. A) greet B) annoy C) approach D) attach

　　90. A) or B) and C) to D) but

　　答案：71-75 ADBBC 76-80 DCCBA 81-85 DACDA 86-90 DBBCA