[ 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:
Tenses › ViewWhat is the structure of the past continuous tense?
A. Subject + has/have + past participle
B. Subject + had + past participle
C. Subject + was/were + verb-ing
D. Subject + will have + past participle
Mixed General Quiz › View
Avoid cooking with utensils made from aluminum or ___.
a. led
b. read
c. red
d. lead
“Open a can of worms” means….
A. share information that complicates the situation
B. getting ready to go fishing
C. openings up a can with stinky food
D. having a difficult time
Grammar › View
That smells good! What ________
A. do you cooking?
B. are you cooking?
C. do you cook?