[ Subject-Verb Agreement ]
Ninety percent of the work ______.
A. Have been done
B. Has been done
C. Have done

Random Topics:
PRESENT SIMPLE vs PRESENT CONTINUOUS + QUANTSimple and Progressive Verb TensesPassive Voice in Past Simple TenseConditional Sentences Type I, IIModal Auxiliaries and To Be VerbsContinuous TenseInterrogative Pronouns & AdverbsDemonstrative PronounsGrammar: Used to, Would, Be used to, Get used toWill or Going toOther quiz:
Grammar › ViewWhen Mary arrived home, her mother… lunch.
A. had been cooking
B. had cooked
C. has cooked
Grammar › View
Dave _____ in a factory. Now he works in a supermarket.
A. working
B. works
C. work
D. use to work
E. used to work
Request with Modal Verbs › ViewCould you ____ me your suit for a wedding?
Of course. But you should dry-clean it first.
A. lend
B. lending
C. lent
Grammar › View
My brother __________ on the phone for two hours.
A. has been talking
B. has been talked
C. have been talking
D. have been talked
