[ Grammar ]
…..realizing what it was, he felt obviously relieved.
A. by the time
B. on
C. while

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Grammar and StructurePresent Simple Tense PassiveModal Verbs & Time PrepositionsPast Simple, Present Perfect TenseBasic GrammarTypes of SentencesAdjectives-Comparison, SuperlativeGrammar - PunctuationModal AuxiliariesModal Auxiliary VerbsOther quiz:
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A. if
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I wish my summer holiday … longer.
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