A：is completed
B：complete
C：has been completed
D：has completed
Great changes have taken place in our city in the past ten years. Everything ______comes into sight is so new to me.
选择最佳应答语（ ）
一跳水运动员从离水面3m高的平台竖直向上跃起，在此过程中可把运动员看作质点，跃起后上升0.2m达到最高点，落水时身体竖直，求运动员从起跳到落水的时间是多少？（不计空气阻力，g取10m/s2）
