[ Grammar ]
I didn’t know ______ book that was.
A. Who
B. Whom
C. Whose

Random Topics:
Grammar: SyntaxGrammar (was, were, could, could not)Past Simple TensesShould and Shouldn'tIdiomsGrammar - Verb FormsConditional ClauseModifiersModal Auxiliary VerbsPresent Perfect vs Past SimpleOther quiz:
Verb Tenses › ViewDifferentiate between past, present, and future tenses: Write a sentence in the present tense.
A. I am running every morning.
B. She runs every morning.
C. They ran every morning.
D. He will run every morning.
Tenses › View
I hope you _____ a nice flat in the city center.
A. found
B. have found
C. will be finding
D. will find