Cheer up and keep on trying. Courage is doing ______.

Would you please bring me the menu— Sure, here you are. ____________ , I will come back for your order.

Can you wait for me for two more minutes –Of course．(选出与画线部分意思相同或相近的选项)

While we are developing agriculture andindustry, we must prevent the earth ______.

Did the boy break the window ______—No. They did it when they were playing football.