[ Grammar ]
Great numbers of tiny shelled animals ………….. on the ocean floor.
A. live
B. living
C. they will live
D. if they lived

Random Topics:
First ConditionalAdverbs of How Something is DoneSo or SuchArticles and QuantifiersGrammar (Adverbs, Prepositions, Prepositional Phrases)Phrasal Verb and ModalDo / Have / Can - Basic QuestionsAction vs Linking Verbs/ Verb PhrasesVerb FormsInfinitivesOther quiz:
Phrases & Clauses › Viewwalking along the beach with my best friend in the world
A. Phrase
B. Dependent Clause
C. Independent Clause
Modals › View
You don’t look well. You ______ see a doctor.
A. should
B. can
C. may
Tenses › ViewI shall walk to the theatre unless it _____ heavily.
A. was raining
B. will rain
C. would rain
D. rains
E. rained
Idioms › View
Don’t you think we should go ___ our plans again?
a. down
b. through
c. on
