The dog had managed to _____ the collar that was choking him.
A. lose
B. loose
C. loosen
D. lost

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Vocabulary, Adjective & PrepositionModals of AdvisabilityPast Perfect and Past Perfect Continuous TenseSimple, Compound, Complex SentencesClause Markers TOEFL GrammarVocabulary and PhrasesConjunctions, Prepositions and InterjectionsGrammar - must & have toVerbal PhrasesPresent Perfect vs Past Simple TenseOther quiz:
Tenses › ViewThey are walking down the street.
A. Past Perfect
B. Present Continuous
C. Future Simple
D. Past Simple
Parts of Speech › View
Identify the part of speech of the underlined word in this sentence:
We have homework in math and communication skills, but we don’t have any homework in science or social studies tonight.
A. Preposition
B. Conjunction
C. Adverb
D. Noun
E. Pronoun
a kind of fabric made from the fibers of the flax plant
A. ring
B. linen
Grammar › View
Which sentence shows a proper use of a plural possessive?
A. All of the student’s backpacks were extremely light on Friday.
B. All of the students’ backpacks were very heavy on Friday.
C. All of the students backpacks’ were very light on Friday.
D. All of the students backpack’s were very heavy on Friday.
