7.They will build a dam for hydroelectricity in this area

     7.They will build a dam for hydroelectricity in this area.

A dam for hydroelectricity.................................................................

      8.People will  spend a lot of money on building the hospital.

              A lot of money................................................................................

      9.He will finish the report  before he  leaves here.

The report  .....................................................................

      10.We will hold the meeting before May Day.

               The meeting..................................................................