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