[ Grammar ]
. He had been working for hours when he _______asleep.
A. has fallen
B. falls
C. fell

Random Topics:
Simple Present ProgressiveQuantifiersSimple Past Irregular & NegativeExpressing Obligation and ModalsModal Verbs & Reflexive PronounsProgressive TenseTenses and OpinionsTemporal Conjunctions and ConnectivesAction, Helping & Linking VerbsAdjective and AdverbOther quiz:
Correlative Conjunction › ViewI play _____ tennis ____ basketball, I suck at sports.
A. either … or
B. neither … nor
C. both … and
D. not only … but also
Grammar › View
It’s almost impossible________________ if you don’t use the right technological tools.
A. to succeed
B. succeed
C. succeeding