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
人气：171 ℃ 时间：2020-06-16 20:09:11
解答
I hope scientists (could )find（find)a cure for cancer
By the middle of this century ,more people will have lived (live)in cities than in the country
Ten years from now,people _have wore (wear)smart clothes
No one has ever_lived (live)on Mars
Humans will live (live）on another plants five billion years from now
A chinese astronaut will reach(reach)Mars by 2050
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