[ Passive Voice & Tenses ]
So far the problem (not/ resolve) ____ has not been resolved.
A. hadn’t resolved
B. has not resolved
C. have not been resolved
D. has not been resolved.

Random Topics:
Modals of AdviceArticles and PrepositionsRelative & ModalsSubject/Verb Agreement with Collective NounsPossessive Pronouns and QuantifiersPresent and Past TensesSuch...that, so ......thatTenses and OpinionsConjunctions, Prepositions and InterjectionsDemonstrative PronounOther quiz:
Grammar › ViewTell if each clause is independent or dependent.
Aborigines are natives of Australia
_
A. independent
B. dependent
Past simple regular verbs › View
Van Gogh — (paint) many famous paintings.
A. paint
B. painted
C. paints
Vocabulary and Grammar › View____________ Bobby often ____________ physics experiment after school?
A. Does/do
B. Is/do
C. Does/do
D. Is/does
Pronoun › View
I told …… that they upload some photos in Instagram to show their activity.
A. they
B. themself
C. them
D. their
