[ Tenses and Articles ]
They ________ in tents.
A. aren’t slept
B. hasn’t slept
C. haven’t sleeped
D. haven’ t slept

Random Topics:
Adjectives & QuantifiersCan/CouldRelative Clauses and UsageGrammar and PunctuationModal Verbs - ObligationTime PhrasesGrammar - NounsSynonyms and VocabularyPast Progressive TenseRelative & Interrogative PronounsOther quiz:
Grammar › ViewI strongly encourage everyone (see) this important film.
A. see
B. to see
C. seeing
Modal Auxiliary › View
You haven’t eaten all day. You …………………… be hungry. (certainty)
A. must
B. can
C. should
D. shouldn’t