Topics: Modal Verb in Passive Voice
Natural resources _________________to protect our planet.
A. must not be conserved
B. must be conserve
C. must not be conserving
D. must be conserved
Select your answer:
Random Topics:
Comparison of Adjective and AdverbGrammar and PrepositionAdverbs by TypeActive-Passive VoicesAdverbs, Modals, Preposition of timePresent and Past TenseDo not or Does notCoordinating Conjunctions and Comparative AdjectivesObject PronounPhrases & ClausesOther quiz:
Conjunctions › ViewDo you want to cycle ______ play football?
A. so
B. or
C. but
D. because
Vocabulary & Grammar › View
A boy tried to sell me an autographed baseball but I realized it was a ______ when I saw the signature.
A. retaliate
B. wholesome
C. pessimist
D. epic
E. sham