Topics: Grammar for TOEFL
The tetracyclines, _____ antibiotics, are used to treat infections.
A. are a family of
B. being a family
C. a family of
D. their family is
Select your answer:

Random Topics:
If/Unless - Conditional type 1May, MightPhrasal Verbs and Verb FormsMaritime Vocabulary and GrammarConnectorsConditional Sentences Type 1Present, Past, and Future TimeConjunctions - Conjunctive AdverbsTenses, Determiners & Subject Verb AgreementVocabulary, Grammar, SpellingOther quiz:
Vocabulary › ViewImpressing somebody with talent but being snobby about it
A. pretentious
B. missteps
C. muster
D. diplomat
Grammar › View
____ you see Jody’s new dog yesterday?
A. Are
B. Did
C. Does
