I'm tired of waiting. We've been sitting here ................. an ... | GrammarQuiz.net

Topics: For & Since

I’m tired of waiting.
We’ve been sitting here …………….. an hour.

A. since

B. for

Select your answer:

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Definite vs Zero Article Abstract Nouns Conditional Sentence Tenses - Passive Voice Pronouns, Verb, Conjunction Present and Future Tenses Subordinate Conjunctions Adverb of Time Gerunds, Infinitives and Modals of Possibility Simple Present and Past Tense Adjectives & Quantifiers

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