[ Tenses ]
There ____ economies since the beginning of civilization, but as a field of study, economics ____ only recently.
A. have been / develops
B. are / has been developing
C. have been / has developed
D. were / was developing
Select your answer:
Random Topics:
To Infinitive/Bare Infinitive/GerundsPresent Simple or Present ContinuousAdverbial Clause, Noun ClausePreposition and Word FormTo Infinitive or GerundConjunctions and PronounsFuture TenseRelative Pronouns with PrepositionsInfinitives or GerundsConditional Sentences Type 0, 1 and 2Other quiz:
Grammar › ViewYou___get up early on weekends.You can relax.
A. must
B. have to
C. mustn’t
D. don’t have to
Vocabulary › View
A synonym for MANIFEST would be:
A. Hide
B. Hint
C. Demonstrate
D. Decrease