[ Vocabulary ]
What is a trace of an ancient organism that has been preserved in rock?
A. oxygen
B. skeleton
C. aluminum
D. fossil
Select your answer:
Random Topics:
Have as verb and auxiliaryComplex SentencesRelative Clauses & Real ConditionalsTransition WordsGrammar: MorphologyGerund/ To Verb/ VerbFuture Tense - will and going toTenses and VoiceSimple Past vs Past Continuous TenseOther quiz:
Passive Voice › ViewShe bought a car last sunday.
A car …… by her last sunday.
A. is bought
B. was bought
C. are bought
D. were bought
E. has bought
Grammar › View
The weather in Brazil is … in the UK.
A. warmer
B. longer
C. higher
D. bigger