[ Modal Auxiliaries ]
Years ago, people _________ only travel to Antarctica by ship.
A. could
B. must
C. may

Random Topics:
ConjunctionIdiom and TensesComparatives - Superlative-ed or -ingSimple Present and Past TenseModal Verbs for SpeculationPast Simple & Past PerfectGrammar - Present Perfect TenseAdverbs of Time and PlacePreposition and ConjunctionOther quiz:
Grammar › ViewIt is still raining now outside. Therefore, the riders ………. their rain coat.
A. are wearing
B. will wearing
C. is wearing
D. have wearing
Modal Verbs › View
She ____ swim across the lake when she was younger.
A. can
B. could
C. to be able to
Grammar › View Will they finish the test on time?
A. adjective
B. verb
C. noun
D. pronoun
E. adverb
Tenses › View
They plan to have a holiday in Bali in December.
In one month, they _____________ at the beach .
A. played
B. will play
C. will be playing
D. plays
