[ Preposition ]
Geologists assign dates to many rock masses ……….. means of radiometric dating, which is a technique based ……… the atomic structure of the elements.
A. in/for
B. for/in
C. as/with
D. by /on
Select your answer:

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Verbs - third personNouns as AdjectivesNoun Clauses with THATPersonificationRelative ClauseModals of ProbabilityWriting and Modal AuxiliaryVerb Types and TensesProverbsTenses and StructuresOther quiz:
Grammar › ViewMy father …. the morning paper when he’s on the train to work.
A. will read
B. reads
C. read
D. reading
Grammar › View
The money for the charity _____________________ sooner than we expected.
A. have been collecting
B. had collected
C. was collected
D. is collecting
