托福词汇辅导：托福关键词汇(17)

　　1. Weed killers must be chosen and applied with great care to avoid damage to adjacent trees and shrubs.
　　[A] indigenous [B] nearby [C] perennial [D] similar

　　2. Eleven states, including the adjoining states of North and South Carolina, seceded from the United States in the 1860s and formd a souththern confederacy.
　　[A] separated [B] neighboring [C] colonial [D] competing

　　3. Sleep is beneficial to organisms because it enables them to get rid of accumulated wastes and to build up depleted materials.
　　[A] refreshing [B] irresistible [C] advantageous [D] required

　　4. Some animals, such as rodents, are able to clasp their food with their feet.
　　[A] bury [B] hold [C] eat [D] clean

　　5. Star fish clings to stones by the suction of their innumberable tube feet.
　　[A] attracts [B] destroys [C] holds fast to [D] swims over to

　　Keys: BBCBC