4.So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.

所以，在未来的数百万年中，生命能否在地球上延续取决于这个问题能否得到解决。 第一个whether引导主语从句。 Whether_we_will_hold_a_meeting hasn't been decided.

我们还没有决定是否要开一个会。 　　

　　1．(教材P25)The earth became so violent that it was not clear whether the shape would last or not.

　　地球(开始)变得如此激烈动荡，以至于不知道这个固体形状是否会继续存在下去。

　　violent adj.猛烈的；激烈的；强暴的

　　(1)a violent attack/storm　　 猛烈的攻击/暴风骤雨

　　(2)violently adv. 猛烈地；凶猛地

　　violence n. 暴力；暴行；激情

　　with violence 猛烈地；强有力地

　　take ...by violence 强夺......

　　①He was caught in a violent storm yesterday.

　　他昨天碰上了暴风雨。

　　②The wind blew violently (violent) and the climbers had to give up.

　　风刮得很猛，登山队员们不得不放弃。

　　③The young man was charged with robbery with violence.

　　这个年轻人被指控暴力抢劫。

　　[语境串记]　Tom was in violent pain.As a result, he behaved violently and treated everything with violence.

　　汤姆处于极度痛苦之中，因此他表现得很粗暴，一切都以暴力对待。

2．(教材P25～26)They were in time to produce carbon dioxide, nitrogen, water vapor and other gases, which were to make the earth's atmosphere.