[ Tenses ]
You must ____________ a helmet.
A. wear
B. wearing
C. wears
D. is wearing

Random Topics:
Present Perfect SimpleTenses and ArticlesArticles and QuantifiersThird ConditionalComparison of Adjective and AdverbCohesive DevicesPrepositionWord Form & Verb TenseConditional ClausePast and Past ContinuousOther quiz:
Tenses › View-Is this your first visit to London?
-No, I ___ here several times before and I ___ quite at home in London.
A. was/have felt
B. have been/feel
C. had been/felt
D. has been/felt
E. were/have felt
Gerunds and Infinitives › View
I … one or two cups of coffee every morning.
A. to drink
B. drinking
C. drink
Grammar › ViewHe couldn’t concentrate ………………. his work, so he went for a walk.
A. on
B. in
C. about
D. at
Grammar › View
I live in ___ apartment. ___ apartment is big.
A. a, the
B. an,the
C. the, the
