I used to go ____ with my mum on clear nights and look at the sky. It looked like black velvet with a million ____ on it. In different seasons, we saw different groups of stars. Sometimes we saw stars ____ brightly ____ the sky. How beautiful they were!

    Studying the stars was great ____ for me. Once I learnt a little about them, I soon wanted to find out more and more. Now it is my ____. I host a TV program ____ The Sky at Night. I use my knowledge to tell people about the stars in a ____ way. I am proud of my TV program me—it has ____ for more than 50 years!

“临街的店铺都挂着很大的牌匾。”这句话中“临”的意思是(   )。

一个足球运动员用100N的力踢一个重为5N的足球，球离脚后在水平草地上向前滚动了30m．在足球滚动的过程中，运动员对足球做的功为（）