Reforestation projects in China are designed to replant __________ in areas that suffer from desertification.
A.
grass
B.
trees
C.
flowers
D.
cacti


Irrigation canals in Central Asia divert water from __________ to feed crops.
A.
seas
B.
rivers
C.
lakes
D.
oceans

Societies in Central and East Asia manage their water supplies in all of the following ways except by __________.
A.
building reservoirs
B.
constructing dams
C.
initiating irrigation projects
D.
restricting drinking supplies