[ Grammar ]
The rule is that my children ____ finish their homework before they go out with friends.
A. have to
B. has to
C. should

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Present and Past TenseAdverb of Frequency and TensesSome & AnyPresent Perfect: for/sincePassive Modals, Impersonal PassiveTenses and Word FormationVerbs & Phrasal VerbsCan vs CouldAdverbial ClausesPassive Voice with ModalsOther quiz:
Passive Voice › ViewI looked again for the young boy, but he _______.
A. have vanished
B. was vanishing
C. had vanished
-ing &-ed Adjectives › View
In my point of view, studying English grammar rules makes me …..
A. frustrating
B. frustrated