[ Noun and Modal Verbs ]
You _____ book in advance for weekday visits, but you _____ make reservations for weekend tours.
A. mustn’t, have to
B. have to, mustn’t
C. must, don’t have to
D. needn’t, must

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May, MightAdverbs of Frequency & Simple Present TensePresent Simple: affirmative, negative, interrogativePreposition of TimeVocabulary, Adjective & PrepositionSimple Tenses in EnglishTemporal Conjunctions and ConnectivesModals of ProbabilityDefinite, Indefinite and Zero ArticlesGrammar - FutureOther quiz:
Grammar › View……. smoothly
A. keep
B. go
C. break
D. take
Tenses › View
Future Perfect Continuous Tense
How long will you have been waiting for your friend by the time they arrive?
A. I will be waiting for 20 minutes.
B. I will have been waiting for 20 minutes.
C. I will wait for 20 minutes.
D. I have been waiting for 20 minutes.