填空题

The passage contains TEN errors. Each indicated lie contains a maximum of ONE error. In each case, only ONE word is involved. You should proofread the passage and correct it in the following way:
For a wrong word, underline the wrong word and write the correct one in the blank provided
at the end of the line.
For a missing word, mark the position of the missing word with a " ∧ "sign and write the word
you believe to be missing in the blank provided at the end of the line.
For an unnecessary word, cross the unnecessary word with a slash "/" and put the word in the blank
provided at the end of the line.
If it were only necessary to decide whether to teach elementary science to
everyone on a mess basis or to find the gifted few and take them as far as they can go, (1) ______
our task would be fairly simple. The public school system, moreover, has no such (2) ______
Choice, for the two jobs must be carried on at the same time. Because we depend so
heavily upon science and technology for our progress, we must produce specialists (3) ______
in many fields. Because we live in a democratic nation, whose citizens make the
policies for the country, large numbers of us must be educated to understand, to (4) ______
support, and when necessary, to judge the work of experts. The public school must
educate for both producers and users of scientific services. In education there should (5) ______
be a good balance among the branches of knowledge that attribute to effective thinking (6) ______
and wise judgment. Such balance is defeated by too much emphasis on any one field.
This question of balance involves not only the relation of the natural sciences, the social
sciences, and the arts but also relative emphases between the natural sciences (7) ______
themselves. By contrast, we must have a balance between the current and classical (8) ______
knowledge. The attention of the public is continuously drawn to new possibilities (9) ______
in scientific fields and the discovery of new knowledge; these should not be allowed
to turn our attention from the sound, established materials that form the basis of (10) ______
courses for beginners.