[ Grammar ]
What the problem is ………………by tomorrow.
A. will have discovered
B. has been discovering
C. being discovered
D. will have been discovered

Random Topics:
Communicative GrammarPassive Voice and Modalstoo / enoughModal RequestsRelative Clauses and etcPossessive Nouns with Apostrophes and PronounsParts of SpeechPhrase or ClauseLinking Words and PhrasesPresent and Future TensesOther quiz:
Future Tenses › ViewJohn and Sam ______(meet) at Starbucks on Monday at 5.00.
A. John and Sam will meet
B. John and Sam are going to meet
C. John and Sam are meeting
Adjective › View
All the girls fell in love with the ________ teacher.
a.handsome new American
b.American new handsome
c.new handsome American
The heavy storm is the reason ………..I couldn’t go to school yesterday.
A. why
B. which
C. when
Modal Verbs › View
She _______ told me the truth earlier; now it’s too late.
A. shouldn’t have
B. should have
C. might have
D. could have
