400 must have TOEFL words Units 1-5

gathered into; amounting to a whole

• aggregate

• irrigation

• precipitation

• cultivation

in a harmful way; negatively

• People often simply a______ their pets when they go abroad.

preparing the land to grow crops

• Flowers are often f_________ by bees as they gather nectar.

to gain possession of; to get

• aggregate

• intensify

• obtain

• irrigate

• The fighting in the area has i__________ sharply.

the supplying of water to dry land

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

water that falls into Earth's surface