[ Tenses ]
I ________ (study) for the exam when my friend called.
A. will study
B. was studying
C. studied
D. am studying

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Second ConditionalsGrammar : Must (Necessity)Conditional and SubjunctivePast Perfect Tense and Past TensePresent Simple and ContinuousAdverbs of TimeVerb Tenses (Progressive, Perfect)Participle Clauses & Cleft SentencesAdverb Clauses of TimeCommasOther quiz:
I vs. Me › ViewPlease give the book to ….. after you read it.
A. He
B. His
C. Her
D. Hers
Grammar › View
An error that occurs as a natural part of the learning process
A. Grammatical error
B. Developmental error
C. Lexical error
D. Covert error