65. The authors of the Ambio study have found that ________.

　　A) forests get rid of lead pollution faster than expected

　　B) lead accumulations in forests are more difficult to deal with

　　C) lead deposits are widely distributed in the forests of the US

　　D) the upper layers of soil in forests are easily polluted by lead emissions

　　66. It can be inferred from the last paragraph that scientists ________.

　　A) are puzzled by the mystery of forest pollution

　　B) feel relieved by the use of unleaded gasoline

　　C) still consider lead pollution a problem

　　D) lack sufficient means to combat lead pollution

　　Part V Cloze (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.

　　For the past two years, I have been working on students' evaluation of classroom teaching. I have kept a record of informal conversations __67__ some 300 students from at __68__ twenty-one colleges and universities. The students were generally __69__ and direct in their comments __70__ how course work could be better __71__. Most of their remarks were kindly ___72___ - with tolerance rather than bitterness-and frequently were softened by the __73__ that the students were speaking __74__ some, not all, instructors. Nevertheless, __75__ the following suggestions and comments indicate, students feel __76__ with things-as-they-are in the classroom.

　　Professors should be __77__ from reading lecture notes. "It makes their __78__ monotonous(單調的)."

　　If they are going to read, why not __79__ out copies of the lecture? Then we __80__ need to go to class. Professors should __81__ repeating in lectures material that is in the text-book. "__82__ we've read the material, we want to __83__ it or hear it elaborated on, __84__ repeated." "A lot of students hate to buy a __85__ text that the professor has written __86__ to have his lectures repeat it."