[ Modals for Obligation ]
You _____________________ pay attention in class.
A. must
B. mustn’t

Random Topics:
So, Such, Many, MuchRelative & Interrogative PronounsPast Perfect vs Past SimpleModal Verbs of PermissionPresent tense AffirmativeGrammar and Verb TensesCountable & Noncountable NounsModal Verb Gerund or To InfinitivePast and Present Continuous tensePossessive PronounsOther quiz:
Grammar › ViewThe students, who hated writing essays, ___ surprised they enjoyed the essay’s topic.
A. was
B. were
Grammar and Vocabulary › View
. Doesn’t your cousin work as _____ architect?
A. the
B. an
C. –
Vocabulary › ViewTaking responsibility for one’s own actions
A. Accountability
B. Conscience
C. Temperance
D. Beneficence
Grammar › View
Yuri Gagarin was one of the pioneers of space _____.
A. exploration
B. explorer
C. exploring
D. explorers
