Vocabulary --> Health --> Dentist's Office --> Word to practice

Choose the word that best completes the sentence:


1. An ............... at the gum line can be nothing serious or the symptom of a larger problem.
A. irritate
B. irritable
C. irritation
D. irritability
Explain:


2. Knowing his ............... tidiness, I′m not surprised to learn that David flosses three times a day.
A. habit
B. habitually
C. habitualness
D. habitual
Explain:
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