[ 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
Random Topics:
How often - long - much - manyAsking & Giving AttentionGrammar RulesGoing To Be and WillPerfect Verb TensesModalPersonificationActive & PassivePositive and Negative ConnotationsVerb Patterns / IngOther quiz:
Grammar › ViewDo you think this bag goes ___ my jacket?
A. with
B. for
C. to
D. at
Grammar › View
Mary/swim/now
A. Mary are swimming now.
B. Mary is swimming now.
C. Mary is swiming now.
Grammar › ViewListen! The baby ______ over there.
A. is crying
B. are crying
C. to cry
D. crying
Preposition of Time › View
After I eat dinner, I like to watch TV _____ the evening.
A. in
B. on
C. at