[ Modal Verbs ]
. Dolphins ___ communicate through a series of clicks and whistles.
A. can
B. could
C. able to
D. must
Select your answer:

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Adjective and AdverbPresent Perfect Simple vs ContinuousAdverbs (manners & modifiers)Grammar - Imperatives and LetPast Tense vs Present TensePassive SentencesComparisionsRelative Pronoun/AdverbsVerb FormTime Clauses of FutureOther quiz:
Tenses › Viewwe ___ your size at the moment, but we can order it for you.
A. haven’t had
B. didn’t have
C. aren’t having
D. don’t have
E. won’t have
Vocabulary › View
to throw away something encumbering
A. cuckold
B. jettison
C. pseudonym
D. sordid
