[ 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:
Mixed General Quiz › ViewIn the museum a lot of people were looking ___ the beautiful painting.
a. at
b. for
c. after
Grammar › View
Find the mistake: I still did my homework at 10:30 last night
A. Were still doing
B. previous night
C. Was still doing
D. at
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