The___________of the outbreak of the disease is still unknown. ...

[ Grammar ]

The___________of the outbreak of the disease is still unknown.

A. aim

B. cause

C. motive

D. reason

Select your answer:

Random Topics:
Infinitives Mixed Tenses Verbs Grammar - Imperatives and Let Articles and Prepositions Prepositions of Time, Place, and Movement Grammar: Adjectives & Prepositions Grammar Pronoun and Singular Plural Noun Nouns and Quantifiers

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A. shouldn’t

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