Englishfor English speakers
Mexico
Proper noun
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Mexico is a country in North America. It is south of the USA.
d
Noun
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The fourth letter of the alphabet.
"c" comes before "d"
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In some schools, an D is a poor grade.
Liam did not pass this exam because he got a D.
f
Noun
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F is the sixth letter of the alphabet.
"e" comes before "f"
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In some schools, an F is a grade that shows that you have failed completely.
This student has not made any attempt in the exam; he only got an F.