Economics is the most interesting subject
A. Economics has been the most interesting subject
B. Economics have been the most interesting subject
C. Economics is have the most interesting subject

Random Topics:
Adjectives with -ED and -INGPresent Simple/AffirmativeConjunctions, Interjections and Sentence TypeGerund/ To Verb/ VerbGrammar ElementaryPassive Modals in Different TensesSports VocabularySimple and Continuous TensesGrammar-Present Continuous-Sentence MakingHow often - long - much - manyOther quiz:
Future Continuous Tense › ViewSanjit and his classmates ___________________________ seashells when they clean up the beach.
A. will not collecting
B. will not collected
C. will not be collects
D. will not be collecting
Grammar › View
My best friend…….four languages.
A. speaks
B. speakes
C. goes
D. go
Future Tenses › ViewBy the first of December this year I ….. here for fifteen years already.
A. work
B. will be working
C. will have worked
D. will work
Tenses › View
I _____ my girlfriend for a couple of years and during that time I … many changes in her personality.
A. Have seen … have seen
B. Have seen … have been seeing
C. Have been seeing … have been seeing
D. Have been seeing … have seen