题目内容
28. After many years of __________ study, he has ultimately received his medical degree in this month.
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29. Her plan is based on the underlying __________ that the economy will improve in the near future.
30. The device, according to the manual, has the __________ of recording two television channels at once.
31. The cool __________ moved through the trees around him, whispering just loud enough to obscure the singing.
32. Public transport has not been able to cope adequately with the travel __________ .
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