[ Modals of Obligation ]
We _______ recycle our plastic bottles to reduce waste.
A. must
B. may
C. can
D. ought to

Random Topics:
Past simple regular verbsPhrasal Verb and ModalInterjections, Tag Questions and Nouns of Direct AddressDemonstrative SpeechConjunction and PunctuationComplex SentencesFuture Tense (will/be going to/p.continuous)First Conditional, Future Time ClausesPerfect Verb TensesGrammar : Structural Common ErrorsOther quiz:
Grammar › ViewThey _______ their football in the field last Tuesday.
A. leave
B. leaves
C. left
D. leaved
Grammar › View
Actions in progress at the time of speaking.
A. Present simple
B. Present continuous
Countable & Noncountable Nouns › ViewAre there (…) computers in the library?
A. much
B. some
C. any
Grammar › View
… tell me what time it is, please?
A. Must
B. Do
C. Could
