We often use “have to” instead of “must” to talk about:
A. habit
B. opinion
C. rules or obligations
D. preference

Random Topics:
Articles & Compound NounsDefinite ArticlesQuantifiers & Modals of ObligationAdjectives or AdverbsConditional Sentence 0, 1TOEICState Verbs and Action VerbsProgressive Verb TensesModals of AdviceWill vs be going toOther quiz:
Vocabulary and Grammar › ViewTransform the sentence into a negative sentence: My aunt Susan is beautiful!
A. My Aunt Susan isn’t beautiful , no?
B. My Aunt Susan does isn’t beautiful!
C. My Aunt Susan isn’t beautiful.
D. My Aunt Susan beautiful isn’t .
Grammar › View
Be
A. saw, been, was
B. was/were, been
C. become, became
D. is, had, had
Simple Present Tense › View(Mr. Chan/ teach) English?
A. Is Mr. Chan teach English?
B. Does Mr. Chan teach English?
C. Are Mr. Chan teach English?
D. Do Mr. Chan teach English?
Modals › View
I advise you to use natural remedies whenever you can.
A. You must use natural remedies whenever you can.
B. You ought to use natural remedies whenever you can.
C. You should to use natural remedies whenever you can.
