400 must have TOEFL words Units 1-5

gathered into; amounting to a whole

• aggregate

• irrigation

• precipitation

• cultivation

in a harmful way; negatively

(a)  

• People often simply a (a)   their pets when they go abroad.

preparing the land to grow crops

(a)  

• Flowers are often f (a)   by bees as they gather nectar.

to gain possession of; to get

• aggregate

• intensify

• obtain

• irrigate

• The fighting in the area has i (a)   sharply.

the supplying of water to dry land

(a)  

the process by which green plants turn carbon dioxide and water into food using energy obtained from light from the sun

(a)  

water that falls into Earth's surface

(a)