把下列句子组成语意连贯的语段，排序最恰当的一项是(　　)①他还指出“没有先前生物的模型或胚种”②他似乎认为世界上的栖息者在陆续的时期内几近灭绝③马修先生的观点和我的观点之间的差异是无关紧要的④其后又重新充满了这个世界⑤也可能产生新类型⑥这些观点表明他似乎认为生活条件的直接作用具有重大的影响，已清楚地看到了自然选择原理的十足力量

The foreign teacher suggested __________ more to improve our reading skills．

Have you heard of _______ death of Nelson Mandela —Yes. It is indeed _______ loss to the world.

When the boy walks _______ the table, he often knocks the things _______ it.

In the last decade, disasters have become increasingly common. It’s high time that we ______these issues more seriously.