1.   An investigation revealed that the mine was polluting both the air and the groundwater.

2.   Careful investigation had revealed no other possible motive for the killing.

3.   Further investigation revealed that other zinfandels showed a similar pattern.

4.   Further investigations will reveal a last-minute change of plan, bringing the ever popular Syd Little to an even greater public.

5.   The investigations revealed that there were, in fact, no clear trends.

6.   Investigations had revealed extensive rot in the beams under the ground floor.

7.   An investigation revealed that the garage had been bilking motorists for repairs that had never been made.

8.   Investigations have revealed unacceptably high levels of industrial solvents in groundwater under Birmingham, Coventry, Luton and East Anglia.

9.   Central South investigation has revealed that prices on the continent can prove cheaper than Britain.

10.   Investigations revealed he was driving without insurance or a licence.