Man’s understanding of nature is developing ________. It never stays at the same level.
【陕西省2015年中考英语试题】Many city people their bikes to work every day.
【山东省临沂市2015年中考英语试题】Teenagers should ________ to take care of themselves from a young age.
【山东省临沂市2015年中考英语试题】Tim Cook called his mother every week even while he_______ around the world.
【辽宁省丹东市2015年中考英语试题】In order to make Dandong more beautiful, more trees and flowers ________ every year.
【辽宁省丹东市2015年中考英语试题】—I called you at 8:00 last night, but you didn’t answer.—Oh, I ________.