[ Subject Verb Agreement ]
Either thunder or lightning flashes (are, is) let out by the sky.
A. are
B. is

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Modals and VocabularyInfinitive and GerundWas & Were QuestionsConjunctions and TransitionsGrammar, Conditional Sentences, VocabularyGrammar and VocabulariesPresent ContinuousPast, Present, FutureIf/Unless - Conditional type 1Grammar of Future PlansOther quiz:
Grammar › ViewThe Singapore football team will be playing ___ the Malaysian team in the next match.
A. into
B. over
C. across
D. against
Grammar › View
The farther away from the earth the human is … the gravitational force of the earth.
A. The least
B. The less
C. Much less
D. Much least
When I grow up, I want a good paying job, so I can take care of my mom.
A. Simple
B. Compound
C. Complex
D. Compound-Complex
Vocabulary › View
Flippancy; joking about serious matters
A. alchemy
B. postulate
C. levity
D. euphemism
