26.This passage is primarily about (A)the causes of malaria and yellow fever. (B) how mosquitoes bite their victims. (C)diseases carried by insects. (D) the mosquito’s function as a disease carrier.

28.The final sentence of the passage implies that the writer thinks (A) disease-carrying mosquitoes still pose a significant threat. (B) screens and insect repellent are ineffective protection against mosquitoes. (C) the threat of disease being transmitted by mosquitoes no longer exists in the U.S. (D) screens and insect repellent are the best protection against mosquitoes.

26.This passage is primarily about (A)the causes of malaria and yellow fever. (B) how mosquitoes bite their victims. (C)diseases carried by insects. (D) the mosquito’s function as a disease carrier.

其他試題

26.This passage is primarily about
(A)the causes of malaria and yellow fever.
(B) how mosquitoes bite their victims.
(C)diseases carried by insects.
(D) the mosquito’s function as a disease carrier.