小题1:C
小题2:A
小题3:B
小题4:B
小题5:A
小题1:根据文章内容可知答案为C
小题2:根据文章内容By the year of 2050, cloning（克隆）will be used in many ways. It will bring back animals which disappeared many years ago可知答案为A
小题3:.根据文章内容：In 2050, China will be richer than it is now, Beijing will be getting ready for the 40th Olympic Games in 2052可知答案为B
小题4:根据文章内容Robots will be very popular. They will do what people don’t want to do. We’ll build new homes on other planets. By then, I’ll be sixty years old.可知答案为B
小题5:根据文章内容可知答案为A