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10. In developed countries, before toxic chemicals are released into rivers and lakes, they should be treated in order to avoid                  . 
Part ¢ó Listening Comprehension£¨35 minutes£© Part ¢õCloze (15 minutes)

Directions:There are 20 blanks in the following passage.For each blank there are four choices marked A),B),C)  and D)  on the right side of the paper.You should choose the ONE that best fits into the passage.Then mark the corresponding letter on Answer Sheet 2 with a single line through the centre.

In recent years, more and more foreigners are involved in the teaching programs of the United States. Both the advantages and the disadvantages67     using

foreign faculty(½Ìʦ×ܳƣ©68     teaching positions have

to be69     , of course. It can be said that the foreign

70      that makes the faculty member from abroad an

asset also71     problems of adjustment, both for the university and for the individual. The foreign research scholar usually isolates72     in the laboratory as a

means of protection;73      , what he needs is to be fitted

74      a highly organized university system quite different

from75     at home. He is faced in his daily work