Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions Many people and organizations have been making every possible effort in o

A  endangered species: các loài gặp nguy hiêm

B. dangerous (adj): nguy hiểm, nham hiểm…

C. fearful (adj) : lo lắng, sợ hãi, kinh khủng, đáng sợ : fearful of something/ of doing something

D. threatening  (adj)/ n :   đe dọa hăm dọa, sự đe dọa