[ Vocabulary ]
What is a trace of an ancient organism that has been preserved in rock?
A. oxygen
B. skeleton
C. aluminum
D. fossil

Random Topics:
Relative ClausesGrammar: so and suchThere is or There areAuxiliary Verbs, if, unless and ModalTo Infinitive or Bare InfinitiveModal Verbs for PossibilityGrammar - Punctuation of SentencesGrammar - Present PerfectModal AuxiliariesSubordinating ConjunctionsOther quiz:
Wish, Unless, If sentence › ViewIf only tomorrow _____ fine.
A. will be
B. were
C. would be
D. had been
Tenses › View
Lily ____ her art for a long time, and she often ____ pieces in local galleries.
A. was creating / displayed
B. has been creating / displays
C. created / is displaying
D. creates / has displayed