[ Cardiology Services ]
The structure that prevents the backflow of blood in the heart is known as the____________.
A. septum
B. mediastinum
C. valve
Random Topics:
ConditionalSubject Verb Agreement and Coordinating ConjunctionsSecond ConditionalWas & Were QuestionsAuxiliary Verbs & Question TagsPersonal Pronouns and VerbGerunds as Objects of PrepositionsMix-TensesGrammar - Capitalization and Possessive NounsVocabulary Spelling GrammarOther quiz:
Present Simple Tense › ViewPresent simple with Yes-no questions: Form a yes-no question using present simple tense: She drinks coffee every morning.
A. Does she drinks coffee every morning?
B. She drinks coffee every morning?
C. Do she drinks coffee every morning?
D. Does she drink coffee every morning?
Grammar › View
The pupils ______________ when the bell ____________.
A. wrote / rang
B. wrote / was ringing
C. were writing / rang
D. were writing / was ringing
Present Perfect Tense › ViewIt ____ snoweda lot this winter.
A. have
B. has
Grammar › View
Identify the part of speech of the underlined word.
The best breakfast in town!
___
A. Noun
B. Pronoun
C. Verb
D. Adverb
E. Adjective