[ Grammar for TOEFL ]
The Dewey decimal system, currently used in libraries throughout the world, _____ all written works into ten classes according to subject.
A. dividing
B. divides
C. it would divide
D. was divided

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Past and Present TensesUncountable NounsMay, MightPossessive NounsApostrophe GrammarAlthough / DespiteExpressing Obligation and ModalsGrammar-Verbs & Nouns Singular, Plural, GenderGrammar and PrepositionsPresent/Past/Future Continuous TenseOther quiz:
Conjunction › ViewI’m cold so I am going to put ___ a sweater.
a. on
b. in
c. at
Grammar › View
Which answer is closest to obstacles?
A. methods
B. changes
C. difficulties
D. differences
