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The correct spelling of the word
is through.
Writing trough instead
of through was
probably not really a spelling error but a typing mistake or what we
call a typo.
The letter h was
omitted.
Because trough is a
real word, the spell check on the computer did not catch it. We can see that
it is very important to review or proofread our work very carefully because we
can
not depend on the computer to find and correct all of our mistakes. |