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Who invented ____ lightbulb?
A. the
B. a
C. an
D. none
Random Topics:
Simple Future - WillFirst Conditional, Future Time ClausesVerb ConjugationPositive and Negative ConnotationsPresent, Past and Future TenseComparison and ModalsPrepositions of Place & TimeGrammar - TOEICAdverb Clause Connector-ing form and the to-infinitiveOther quiz:
Vocabulary › ViewA testable prediction used to see how something works or to solve a problem.
A. Test
B. Hypothesis
C. Balanced Forces
D. Theory
E. Gravity
Grammar › View
The kitchen is a complete mess! What ___ (the children/do)?
A. Have the children done
B. Has the children done
C. Have done the children
D. Has done the children