So whether life will continue on the earth for millions of y

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So whether life will continue on the earth for millions of years to come wil
depend on whether this problem can be solved
分别解释一下第一个和第二个whether 为什么不能用if

whether有两个用法,一是与if可互换的条件从句引导词,一是表选择的,“是否”之意,可理解为省掉or引导的从句depend on whether this problem can be solved （or not).

So whether life will continue on the earth for millions of y so weather life will continue on the earth for millions of y So whether life will contitue on the ear The question of whether English will continue changing in th Scientists think there has been life on Earth for millions o On the way of life,we can only continue go 英语翻译Insects lived on earth for millions of years.They lived The war went on for years,( ) millions of people 英语翻译Volcanoes have been erupting on the earth for millions o Why the water is the origin of life on earth? 英语翻译[All my life]Waiting for someone,amongst the millions of Man _______ on the earth for thousands of years .