[ Grammar ]
Who ……………………….. the causes of economic crisis ? Economists ………………..
A. does know / know
B. knows / do
C. is knowing / is
D. do know / do
E. did know / did

Random Topics:
Neither/Either/All/NoneWish - beginnerWord FormationWish SentencesArticles - rulesGerunds, Infinitives and ParticiplesGerund after Prepositions and Certain VerbsVerb Types and TensesConditional TypesQuestion Tags in Verb TensesOther quiz:
Grammar › ViewThey ___________ to the party last night.
A. goes
B. went
C. going
D. gone
Grammar › View
My sister _______ a book when my brother _______ mineral water last night.
A. read – was drinking
B. were reading – drank
C. was reading – drank
