[ Grammar and Sentence Correction ]
Did you hear a (nock, knock)?
A. nock
B. knock

Random Topics:
Verbs: Will & Going toPresent simple or Past simpleModals - Conditionals - Future TensesAuxiliaries VerbGerunds and InfitinitivesPast ModalsPresent Perfect Simple vs ContinuousVocabulary and Verb TensesGiving and Asking for AbilityPast Simple TenseOther quiz:
Phrasal Verbs › ViewA: Do you know the answer to this problem? B: No. I can’t figure ___.
A. it on
B. it off
C. it in
D. it out
Adverbial Clause › View
I won’t go to the party _____ you come with me.
A. if
B. unless
C. so that
D. when
Grammar › ViewHow are non-restrictive clauses set apart from the main clause?
A. By commas
B. By dashes
C. By parentheses
D. By semicolons
Preposition of Time › View
I can’t work _______ night.
A. in
B. on
C. at
D. X
