1. The correct plural form of radish is (C.) radishes.
The plural form of the word 'radish' is 'radishes' because the rule says that when a word ends in "-sh", "-es" must be added after "-sh" to make it plural. The same happens with words ending in "-ch" and "-x".
2. The word that requires dropping the end and adding -ies to make it plural is (B.) ability.
The final "y" in "ability" must be dropped and "-ies" must be added instead. This responds to the rule that states that in those words that end in a consonant + "y", the "y" has to be changed to "-ies" to make it plural. It is the case of "ability", which ends in the consonant "t" + "y".
3. The sentence that contains a plural spelling error is (A.) She had to use crutchs for several weeks after breaking her leg.
In this case, the word that contains a plural spelling error is "crutchs". The correct plural form of this word is "crutches" since when a word ends in "-ch", "-es" must be added at the end.
