[ Subject Verb Agreement ]
Oxygen Peroxide ___________ wounds.
A. cleans
B. clean
C. cleaned
D. has cleaned

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Grammar and Sentence StructureHelping and Linking VerbsVerbs with Prepositions and ConjunctionsProgressive TenseBare Infinitive and To InfinitiveConditional Sentence Type 3Perfect TenseAdverbial Clause of ConcessionThe Present Progressive TenseTo Infinitive or GerundOther quiz:
Subordinating Conjunctions › ViewRegular exercise is recommended __________ it helps you stay fit and healthy.
A. whether
B. although
C. until
D. because
Adjectives and Vocabulary › View
A word that describes a noun or a pronoun is …
A. noun
B. verb
C. adjective
D. preposition