37.We must be careful not to do anything that might .............. the economic recovery. A. danger B. dangerous C. endanger D. endangered 38.Up to now, we have hardly estimated the ..........that our country suffered during the war. A. destroy B. destroyable C. destructive D. destruction 39. The regulation of the competition will be announced .........on TV next week. A. office B. officer C. official D. officially 40. Van Cao is one of the most well-known...............in Viet Nam. A. music B. musical C. musicians D. musically