几道英语选词填空题(大家帮帮忙哈~~~谢谢~~)

几道英语选词填空题(大家帮帮忙哈~~~谢谢~~)
词语:and,but,be,before,srand,think,science,late,stay,have to,
come ture,arrive at.
There are many people in the world now.There 1._______a lot more people next century.The earth will be very crowed 2._______ there will be a little room for each person.Maybe there will be 3._______room only on the earth 600years 4.________.That will be a very serious problem.
So man is 5._______ of a way to solve the problem.
The moon is the satellite ofthe earth. Maybe man will go to 6.________on themoon one day.But there is no air,no lifethere,So sciences are doing experiments in many ways.They 7.________solve problems 8.________man can live on the moon.I'm sure ourdream will 9.________in the m=next century.