[ Conjunctions ]
Most lighthouses rhythmically flash ______ eclipse their lights to provide an identification signal. The particular pattern of flashes ____ eclipses is known as the character of the light, _____ the interval at which it repeats itself is called the period.
A. or, or, and
B. but, or, and
C. and, and, or
D. or, and, but

Random Topics:
Pronoun Antecedent AgreementPresent Perfect, Present Simple, Present ContinuousNarrative, Past TensesGrammar - Future ActionGerund and InfinitivesGrammar SuffixesAdverbs of frequencyVerb TensesAdjective Clause and Adverb ClauseHave to / Do not have toOther quiz:
Grammar › ViewDid you see [whom / what] just passed across the sky?
A. whom
B. what
Grammar › View
. . . family enjoys spending time together.
A. Our
B. Ours
C. Us
D. We
Conjunctions › ViewI didn’t get the job … I had all the necessary qualifications.
A. although
B. because
C. in spite of
D. despite
Past Simple and Past Continuous Tenses › View
Which tense is used to talk about specific actions that happened at a particular time in the past?
A. Future Continuous
B. Present Perfect
C. Past Continuous
D. Past Simple
