1.   Because of acid rain, this Scandinavian lake is now too acid to support fish.

2.   Because of pollution, this lake is now too acid to support fish.

3.   From the map, it looked as if the lake was still a long way off.

4.   It is early autumn, the lake is deep and cold, the soldiers can not stay here for ever.

5.   Lake should be forthright in discussing his association with the institute.

6.   Most polar lakes are highly oligotrophic, with clear waters and a very limited range of species inhabiting them.

7.   The lake is at the foot of an extinct volcano.

8.   The lake is flat, its hard crust free of fresh snow.

9.   The lake is much prettier than I had imagined.

10.   The lake is quite shallow.