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参考答案
• 1. keeping up with the rest of the class.
• 2. none of us expected the chairman to turn up
• 3. as was to be expected
• 4. an art as it is a science
• 5. could have made a good salary.
• 6. to have no access
• 7. to students' being late for
• 8. ranges/varies from 50 cents to $4
• 9. to reserve a table for
• 10. to make trouble
