

11. Ocean water also will expand if it warms, ____further to sea level rise.
A. getting
B. making
C. leading
D. contributing
12. The clearing of land for agriculture, industry, and other human activities have increased ____of greenhouse gases.
A. concentrations
B. attention
C. lots
D. collections
13. Humans ____atmospheric carbon dioxide concentration by a third since the Industrial Revolution began.
A. increase
B. have increased
C. had increased
D. were increasing
14. ____the desalination plant, the company could offer an effective solution to the problem of water scarcity. A. To build
B. Having built
C. Being built
D. Having been built
15. The public praised the local farmers for ____millions of trees on the surrounding hills.
A. plant
B. being planted
C. being planting
D. having planted
A. getting
B. making
C. leading
D. contributing
12. The clearing of land for agriculture, industry, and other human activities have increased ____of greenhouse gases.
A. concentrations
B. attention
C. lots
D. collections
13. Humans ____atmospheric carbon dioxide concentration by a third since the Industrial Revolution began.
A. increase
B. have increased
C. had increased
D. were increasing
14. ____the desalination plant, the company could offer an effective solution to the problem of water scarcity. A. To build
B. Having built
C. Being built
D. Having been built
15. The public praised the local farmers for ____millions of trees on the surrounding hills.
A. plant
B. being planted
C. being planting
D. having planted