题文
In the past 5 years a great deal of money _____ improving the environment of the school.
| A．is spent | B．has been spent | C．was spent | D．had been spent |
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In the past 5 years a great deal of money _____ improving the environment of the school.
| A．is spent | B．has been spent | C．was spent | D．had been spent |
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