[ Grammar ]
_______is necessary for the development of strong bones and teeth.
A. It is calcium
B. That calcium
C. Calcium
D. Although calcium

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Verbal and Appositive PhrasesPrepositionWorld Literature VocabularyModal and Phrasal VerbsTenses and PronounsLinking WordsUncountable NounsModals for DeductionRelative PronounGrammar - Collective NounsOther quiz:
Vocabulary › Viewshow changes in a setting over time
A. theater
B. drama
C. scenes
D. stage directions
Articles › View
There isn’t _____ airport near where I live.
A. a
B. an
C. the
D. –
Idioms › View“Open a can of worms” means….
A. share information that complicates the situation
B. getting ready to go fishing
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D. having a difficult time
Grammar › View
That smells good! What ________
A. do you cooking?
B. are you cooking?
C. do you cook?
