Up to the present, they (understand) what life is.
A. had understood
B. have understood
C. were understanding
D. are understanding

Random Topics:
Grammar (either..or.. and neither..nor..)Linking VerbSimple Future - WillTenses and ArticleSimple present/ past/ future tenseContrastive ConjunctionGrammar - could / could notVocabulary and DefinitionsGrammar - Present Perfect with already, just, yetGrammar - to beOther quiz:
Adverbial Clauses of Manner and Result › ViewHe glanced at the clock nervously. He knew that he was running out of time.
A. He glanced at the clock nervously as if he still had time.
B. He glanced at the clock nervously like he was running out of time.
C. He glanced at the clock nervously although he was running out of time.
Tenses › View
right now, at the moment, today, etc. are signal words for the …
A. present simple
B. present perfect
C. present continuous
D. ‘will’ future
Grammar › ViewThe festival, ______________ lasted all day, ended with a banquet.
A. that
B. who
C. which
D. whose
Modals › View
My girlfriend is expecting me at 8 p.m. I … be late!
A. mustn’t
B. don’t have to
C. have to
D. must
