[ Tenses ]
A: Do you know where John is?
B: I … John this week.
A. have not seen
B. don’t know
C. didn’t know
D. haven’t saw
E. hasn’t seen

Random Topics:
Travel VocabularyState Verbs and Action VerbsPast ModalsFuture Time and TensesConjunctions & PrepositionsSimple Compound and Complex SentencesToo or EnoughVerb PhrasePresent Perfect and Present Perfect Progressive TensesArticles & QuantifiersOther quiz:
Grammar › ViewWe’re studying English hard ………. we want to pass the entrance exams to a prestigious high school.
A. so as to
B. because of
C. because
D. so
Past and Present Continuous tense › View
He ______ a diorama for the science fair with to-scale models of the planets, moons, and asteroids.
A. Designs
B. Had designed
C. Is designing
D. Was designing
Grammar › ViewExcuse me, ………. which is the way to the station ?
A. So
B. But
C. And
Grammar › View
Mr. Rat likes ____________ in the forest.
A. Camping
B. Jogging
C. Fishing
D. Playing
