阅读下面短文, 按照句子结构的语法性和上下文连贯的要求, 在空白处填入一个适当的词或使用括号中词语的正确形式填空。

My uncle Sid is a famous scientist. He likes to make lots of _____(prediction)about the future. He says that in 100 years some things will be better _____ now. For example, we won't have to do the dishes or sweep the floor because we'll all have robots in _____(we)homes. Also, we won't need _____(use)paper money. We'll all use credit cards(信用卡)to buy things. We'll have more free time, and traveling will be_____(fast)and cheaper than it is now. Maybe some people _____(spend)their vacations in space stations.

_____, Uncle Sid says that more things will get_____(bad)in the next century(世纪). If more people use cars, there will be more pollution. Also, if there are fewer trees, the air will become dirtier. If pollution _____(get)really bad, maybe people will have to live on Mars(火星). Uncle Sid says we'll be sorry ______ pollution becomes worse.

【1】_________

【2】_________

【3】_________

【4】_________

【5】_________

【6】_________

【7】_________

【8】_________

【9】_________

【10】_________