问题描述：
还得麻烦你了 I hope scientists _____（find)a cure for cancer
By the middle of this century ,more people _____(live)in cities than in the country
Ten years from now,people ______(wear)smart clothes
No one_______ever_______(live)on Mars
Humans ________(live）on another plants five billion years from now
A chinese astronaut ______(reach)Mars by 2050
By the middle of this century ,more people _____(live)in cities than in the country
Ten years from now,people ______(wear)smart clothes
No one_______ever_______(live)on Mars
Humans ________(live）on another plants five billion years from now
A chinese astronaut ______(reach)Mars by 2050
问题解答：
我来补答展开全文阅读