What does 'constant' mean? A. the ability to concentrate ...

[ Vocabulary ]

What does ‘constant’ mean?

A. the ability to concentrate

B. the treatment of an illness or injury over a period of time

C. the action of thinking hard about something

D. happening continuously

Select your answer:

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Grammar : can, could and be able to during, for, while Relative Pronouns Perfect and Past Tense Adverb of Concession Tenses - Irregular Verbs Vocabulary and Prepositions Conjunctions - Connectors Prepositions

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