翻译一下汉语。
太阳系_______________
环境_________________
宇宙_________________
不可能的__________________
联系，交流____________________
没有一个__________________
群，组______________________

根据句意首字母或汉语提示完成单词。
L____ travels much faster than sound.
Some spacecrafts have gone b____（在……之外）the solar system.
Scientists have discovered many other planets in the u ____.
The earth is a p ____ and we live on it.
The Mars is a _____ (行星)in the solar system.
You should (交流) with your friends more often.
How many (组) are there in your team?
We should protect our (环境) well.

选词填空。
It’s (possible/impossible) for me to finish the task myself. I need your help.
Don’t eat (such/so) much sugar.
Li Hua likes (neither/none) of the three mobile phones.
Xiaoming went to the school yesterday and (other/others) classmates went, too.
The weather in Tianjin is different from (that/it) in Heilongjiang.

I ______ my English teacher for two years.

—How many students are there in the classroom? ____. They are all in playground.