[ Modals of Obligation ]
Visitors _______ register in advance for the guided tour of the museum. However, they are free to come and visit without a guide anytime.
A. must
B. mustn’t
C. can
D. can’t

Random Topics:
Noun PhrasesDemonstrative SpeechAdverbial ClausesVerbs – Nouns – Adjectives - AdverbsPresent Simple with Adverbs of FrequencyGrammar RulesPresent Simple Positive and NegativeParts of SpeechGrammar-Verbs & Nouns Singular, Plural, GenderModals of Speculation and DeductionOther quiz:
Grammar › ViewPolitics __________ his chief interest.
A. is
B. are
Tenses › View
____ the cake be eaten by my brother later?
A. will
B. would
C. do
D. did
Reflexive pronouns › ViewYou can do it by _____ if you have to.
A. herself
B. yourself
C. themselves
Vocabulary › View
Alibi
A. to give emphasis or prominence to
B. an excuse, especially to avoid blame
C. examined or perused carefully
D. a beat or throb, as of the pulse
