Ⅰ.根据句意及首字母或汉语提示完成句子
1．The l________ was too bright. It hurt my eyes.
2．Look! A g________ of children are playing football on the playground.
3．There is the earth, the sun, the moon and many other stars in the u________．
4．Mars is one of the planets of the solar ________(系统) and it goes around the sun.
5．We shouldn't throw rubbish around. It's our duty to protect the ________(环境)．
