Professor Stevens had studied many caves, but he had —– before seen the ones in Castleton.
A. never
B. whenever
C. yet
D. every

Random Topics:
Modal AuxiliaryCommunicative GrammarVocabulary and PrepositionsPresent SimplePassive with ModalsQuantifiers, Countable and Uncountable NounsAdverb of MannersGrammar - QuantiflierGerunds and TensesModal AuxiliariesOther quiz:
Grammar › ViewThe tendency ______ political parties to elevate partisan advantage ______ democratic values is one reason we still have the Electoral College.
A. of, above
B. with, before
C. to, of
Correlative Conjunctions › View
The Jones boys might play tennis this weekend. They might go sailing instead.
A. The Jones boys might both play tennis and go sailing this weekend.
B. The Jones boys will either play tennis or go sailing this weekend.
C. The Jones boys will play either tennis or sailing this weekend.
Modal Verb › ViewPeople who use public parks __________ clean up after themselves.
A. must
B. may
C. ought
D. might
Grammar › View
_____ caterpillars transform into butterflies ?
A. Do
B. Does
C. Was
D. Were
