A. deteriorate B. in charge of C. nuclear D. task A. regiment B. pour C. in place D. sensor A. shy B. boring C. paragraph D. welfare A. dust devil B. cry out C. I'm afraid D. accustom A. cascade B. already C. stay D. turn A. No eating or drinking B. morality C. keep up D. haul A. meanwhile B. erupt C. meteorologist D. call out A. derrick B. genuine C. marquis D. beaver A. circulate B. backache C. proceed D. agreement A. circuit B. tangyuan C. writing paper D. gusher