C)It has been unsteady for years.
D)It has been more than sufficient.
8. The dramatic decline in the enrollment of foreign students in the U.S.after September 11 was caused by ________.
9. Many Americans fear that American competitiveness may be threatened by foreign students who will ________.
10. The policy of welcoming foreign students can benefit the U.S.in that the very best of them will stay and ________.
Unit 5
1. C 2. B 3. C 4. D 5. A
6. C 7. C
8. changes in the visa process
9. take their knowledge and skills back home
10.strengthen the nation
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