Scientists think (assume) that there is no life on the Mars.

__________life could be found on Mars was once believed by scientists.A. WhatB.

Scientists think that the continents ______ always where they ______ today．（ ）A.

[问答题]I think the picture shows us how fruit is necessary to life.

[问答题]I think the picture shows us how fruit is necessary to life.

[问答题]Scientists hope that a remote lake on a dormant Chilean volcano can provide

[单选题]Computers are very important to modern life．Many people think that in the f

[单选题]Computers are very important to modern life．Many people think that in the f

[单选题]Computers are very important to modern life．Many people think that in the f

[单选题]Computers are very important to modern life．Many people think that in the f

[单选题]Computers are very important to modern life．Many people think that in the f