I hope scientists _____（find)a cure for cancer

题目

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

答案

will find
have lived
will wear
has lived
have lived
would reached