[ Pronouns ]
I heard someone at the door but wasn’t sure __________ it was.
A. what
B. which
C. whom
Random Topics:
Gerund, Infinitive, Bare VerbIntermediate GrammarGrammar - Verb FormsVerb ConjugationInfinitiveGRAMMAR - Could / Could notVerbals and GerundsGrammar on ConditionalsConjunctive Adverbs and PunctuationPresent Perfect Simple & Present Perfect ContinuousOther quiz:
Grammar › View“Yeah, I’ve been to Greece.”. My friend told me that he ________ to Greece.
A. been
B. had been
C. was
Vocabulary › View
More than a billion people all over the world are under the threat of desert .
A. ncrease
B. expansion
C. development
D. extension