D's.
To create the plural of any single letter, place an apostrophe between the letter and s.
Letters is the plural of letter
The singular possessive form of letter is letter's. The plural of letter is letters. The plural possessive of letters is letters'
Flagella is already the plural of flagellum.
The plural form of objet d' art is objets d'art.
In English, the term maitre d' (restaurant floor manager) has the regular plural maitre d's.The French is "des maîtres d'hôtel" (no plural mark for 'hôtel')
The plural of the letter "a" is "as."
The plural of letter is letters.
Letters is the plural of letter
The singular possessive form of letter is letter's. The plural of letter is letters. The plural possessive of letters is letters'
ar is not a letter. R is a letter. The plural would be Rs.
Sand (sand) Sind (Wir sind -> we are, plural of "is" / "am")
Flagella is already the plural of flagellum.
2000
d
Missiles. :D
The plural possessive of "letter C" is "letters C's."
The plural form of mouse is mice, so the last letter is an e.