[ Punctuation ]
Choose the correct sentence that uses a comma with a non-defining relative clause.
A. My grandfather, a professor, has written a book.
B. My grandfather a professor has written a book.
C. My grandfather has written a book, a professor.

Random Topics:
Gerund vs InfinitiveConditionals / Unreal PastComparison of Adjectives and AdverbsPresent TensesGrammar - Countable/ UncountableWish clauseWas and WereWould/would like - affirmative/negativeNo Excuse Words / Conjunction SOModals of AdvisabilityOther quiz:
Present Simple & Present Continuous Tenses › ViewThat house ______ Mr. Pike.
A. belong to
B. belongs to
C. belonged
D. are belonging
Grammar › View
What is the antecedent of the pronoun it?
Ivan left some music at the office. It was on a CD.
_____
A. Jinx
B. music
C. It
D. CD
Grammar › ViewMy cat … little and cute.
A. am
B. is
C. are
Grammar › View
___ is very good for your health.
A. Swimming
B. Swim
C. Swims
D. Swam
