题目

1.Earth is becoming more and more __________ (crowd).
2...__________ (hope),we can start again.
3.This pair of boots looks very ____________ (fashion).
4.There will be no ___________ (pollute) on Mars.
5.____________ (science) are working hard to make the dream become true.
B.根据所给中文和句意,填入正确的单词.
6.___________(地球引力) will be a problem for the early settlers on Mars.
7.Humans need food,water and air to __________(生存)
8.Power pack can __________(提供) energy for the spacesuit.
9.A space sleeping bag is used to be fixed to the walls to prevent __________(飘浮).
10.Before the Project of Sanxia,many _________ (移民) left their hometown.
C.用所给动词的正确形式填空.
11.The news makes her __________ (feel) sad.
12.By 2100,we will spend only a few hours _________ (travel) to Mars in space shuttles.
13.Earth will be too polluted _________ (live) on.
14.The speech given by the expert is worth _________ (listen) to.
15.The policeman stops the children fro

提问时间：2020-08-03

答案

1.crowded2.hopefully3.fashionable4.pollution5.scientists6.G-force7.survive8.provide9.floating10.immigrants11.feel12.travelling13.to live14.listening15.playing要解释的话私聊