[ Vocabulary ]
The effort that people devote to a task for which they are paid
A. Efficiency
B. Labor
C. Opportunity cost

Random Topics:
AdjectivesTo Infinitive/Bare Infinitive/GerundsPast Simple and Past ProgressiveAuxiliary WordsPresent Simple vs Present ContinuousFuture - Will and Be going toActive and Passive voiceModals and ConditionalsPerfect Verb TensesPresent Perfect Simple & Present Perfect ContinuousOther quiz:
Tenses › ViewIt ______ since 9 o’ clock
A. will rain
B. will be raining
C. rained
D. has been raining
Tenses › View
If only we ______ the directions!
A. will follow
B. did follow
C. followed
D. had followed
Subject Verb Agreement › ViewHam and cheese _____ served in the restaurant.
A. is
B. are
Grammar › View
Which words complete this sentence correctly?
The remarkable discovery of the Wollemi Pine in the Greater Blue Mountains [________] the area being inscribed on the World Heritage List in December 2000.
A. is why
B. then caused
C. suggested that
D. contributed to
