第84页 - 亮点给力提优课时作业本九年级英语译林版

Four minutes.

He believes that in the future, millions of people

will live and work in space.

By moving polluting businesses away from the

Earth and into space./They can move polluting

businesses away from the Earth and into space.

Because rockets create huge amounts of pollution

(as they burn tons of fuel in order to fly into the sky).

Yes. Because travelling in space can encourage more

people to explore the mystery of space, and thus

contribute to providing more possibilities for future

scientific development. (答案不唯一, 言之有理即可)