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 › ViewYou should try to _____ some money.
A. save
B. spend
Modals Posibility and Probability › View
Jake thinks that he _______________ his electric guitar if he receives an offer.
A. may make
B. might sell
C. could buy
D. may not take
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