The grass is wet because it rained last night. This seems the simplest and most elegant expression of the meaning. I am always suspicious of "reason (s)" and "why" being next to each other. There can be reasons for things but there is usually a better way of expressing "reasons why".
So why do we have four and fourteen, but not fourty? Update: So I guess really the answer is that, unlike a lot of other words that may or may not be spelled with a 'u' in "recent" times (i.e. when American English became a standard), this has been spelt as "forty" for ages.
I'm wondering why we have double letters in words that make the same sound as if it were a single letter. For example apple. The pp makes a p sound, and sound the same as if the word was spelt aple...
Why do we have double letters? - English Language & Usage Stack Exchange
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MSN: Why do men have a low emotional quotient? Here's how it affects their long-term health
Why do men have a low emotional quotient? Here's how it affects their long-term health