[ Vocabulary and Grammar ]
The world is becoming more industrialized and the number of animal species that have become extinct ________ increased.
A. have
B. has
C. are
D. is
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Coordinating & Subordinating ConjunctionsWho am I?Grammar - Countable/ UncountableVocab and GrammarPerfect and Past TensesActive & Passive VoiceAction, Helping & Linking VerbsTenses & AffixesGrammar and Sentence StructureFigure of SpeechOther quiz:
Grammar › ViewWhen two independent sentences are joined by a comma:
A. comma swipe
B. comma splice
C. phrase fragment
D. comma fragment
Grammar & Vocabulary › View
A noun is…….
A. a person, place, thing, or idea.
B. a word that takes the place of a person, place, or thing.
C. an action or being.
D. a word that describes.
Grammar › ViewA monkey _______ a long tail
A. has
B. had
C. have
D. having
Grammar › View
By the time he retired, he ________ for this company for more than twenty years.
A. is working
B. has been working
C. was working
D. had been working