AB为一长为40m的斜面，小球从A处以v₀水平抛出，落地点在B点，斜面倾角为30°，小球在空气中的飞行时间为______s，小球平抛的初速度为______m/s（取g=10m/s²）

You’ll become more confident and stronger after you finish your senior school lessons. You see, hard work _____ character.

A．puts up

B．builds up

C．sets up

D．turns up