[ Pre-intermediate ]
Psychologists know a lot _____ fears
A. of
B. about
C. on

Random Topics:
Countable - Uncountableso vs suchUncountable NounsGerunds and TensesVerb Types and TensesAdverbClauses and ConjunctionPossessive NounsPassive Voice and ModalsSimple Present and Present ContinuosOther quiz:
Sentence Structure and Grammar Rules › ViewFill in the blank: I have never been to Rome, and ___ has my sister.
A. neither
B. either
C. so
D. too
Modal Verbs › View
Complete the sentence:
“Students ____________ to study for their exams.”
A. must
B. can
C. should
D. may
Comparative › ViewMarcela is _______ Karla.
A. uglier than
B. uglies than
C. more uglier than
D. more uglies than
Grammar › View
Some places are very ________. They have an unusual attraction and interesting looks.
A. narrow down
B. exotic
C. mysterious