求这段英语文字的答案.

求这段英语文字的答案.
What will the future be like?What do you think of it?Here are some answers from some students.
Li Shan:I think life in the future will be better.Most people in the world will use “green cars”,so there will be less pollution.As for space travel,I would say,we will travel to Mars(火星) and some other stars in about fifty years.
Huang Lei:If we don’t take good care of the earth now,our children and grandchildren will be born into a world with too much pollution.There will be fewer trees and more buildings,because there will be more people.
Hu Xiao:I agree with Huang Lei.Things will be worse.The weather in the future will be much hotter.So human beings(人类) will have to look for another planet(星球) to live on.
54.\x05What are the students doing?
A.They are talking about space travel.
B.\x05They are predicting( 预测) the future.
C.\x05They are talking about the pollution.
D.\x05They are talking about the weather.
55.\x05How many things does Li Shan predict?
A.Two.B.four.C.Five.D.Six.
56.What does Huang Lei think life will be like in the future?
A.People will live much longer.
B.People will have to live on the moon.
C.Everybody will drive a green car.
D.There will be more buildings and fewer trees.
57.Why does Hu Xiao think human beings will have to live on another planet?
A.The earth will be too crowded for human beings to live on.
B.There will be no pollution there.
C.There will be too many people.
D.The earth will be too hot to live on.

B A D D