[ 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:
Grammar › ViewI have a ______ of heights.
A. fear
B. fears
C. feared
Grammar › View
How many brothers and sisters have you got?
A. How many
B. How much
C. How few
D. How some
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
