[ Grammar ]
My brother ____________ wear a helmet when skiing. It’s optional when you’re over eighteen!
A. mustn’t
B. don’t have to
C. has to
D. doesn’t have to

Random Topics:
Modals - Reported Speech - ConditionalsSimple and Progressive Verb TensesSimilesFuture Tense and Conditionals-ed and -ing AdjectivesCan vs CouldPassive with ModalsVerb to Be Tenses & Object PronounHave to / Do not have toModals of AdviceOther quiz:
Prepositions › ViewWe benefit greatly ________ the medicines and other products that biodiversity provides.
A. from
B. without
C. for
D. at
Grammar › View
The brochure is ___________, so we decide not to buy that machine.
A. uninformative
B. inexperienced
C. impolite
D. unsuccessful
Verbs and Prepositions › ViewWhich preposition correctly completes the sentence: “She worries _ her final exams.”
A. about
B. with
C. on
D. for
Grammar › View
Dr. and Mrs. Kwan ________ visited Spain _______ made stops in Paris and London.
A. both, and
B. not only, but also
C. either, or
D. neither, nor