Cloze Test(20 points)
Directions：There are 10 blanks in the following passage．For each blank there are four choices marked A，B，C and D．You should choose the one answer that best fits into the passage．Then mark the corresponding letter on the Answer Sheet with a single line through the center．

21、 根据以下内容回答21-40题：
Many teachers believe that the responsibilities for learning lie with the student．(1)a long reading assignment is given，instructors expect students to be familiar with the information in the reading even if they do not discuss it in class or take an examination．The(2)student is considered to be one who is motivated to leam fbr the sake of(3)，not to be one interested only in getting high grades．Sometimes homework is returned with brief written comments but without a grade．Even if a grade is not given，the student is(4)for learning the material assigned．When research is assigned，the professor expects the student to take it actively and to complete it with(5)guidance．It is the student’s responsibility to find books，magazines，and articles in the library．Professors do not have the time to explain(6)a university library works；they expect students，paticularly graduate students，to be able to exhaust the reference(7)in the library．Professors will help students who need it，but prefer that their students should not be(8)dependent on them．In the United States professors have many other duties besides teaching，such as administrative or research work．(9)，the time that a professor can spend with a student outside of class is limited．If a student has problems with classroom work，the student should either(10)a professor during office hours or make an appointment．
请回答(1)题
A．If
B．Although
C．Because
D．Since


22、 请回答(2)题
A．poor
B．ideal
C．average
D．disappointed


23、 请回答(3)题
A．fun
B．work
C．learning
D．prize


24、 请回答(4)题
A．criticized
B．innocent
C．responsible
D．dismissed


25、 请回答(5)题
A．maximum
B．minimum
C．possible
D．practical


26、 请回答(6)题
A．when
B．what
C．why
D．how


27、 请回答(7)题
A．selections
B．collections
C．sources
D．origins


28、 请回答(8)题
A．too
B．such
C．much
D．more


29、 请回答(9)题
A．However
B．Therefore
C．Furthermore
D．Nevertheless


30、 请回答(10)题
A．greet
B．annoy
C．approach
D．attach