[ Tenses ]
He slipped while he ___ the stairs.
A. climbed
B. climbs
C. was climbing
D. is climbing

Random Topics:
Verb Tenses and SubordinatesVerb Tenses and Subject Verb AgreementVerbs - third personTOEIC Tenses, VerbsThings in EnglishGerunds and Infitinitivestoo / enoughused to vs be used to vs get used toVerb FormsLinking Words and ConjunctionOther quiz:
Grammar › ViewThe students usually……… fifteen minutes before the class starts.
A. to come
B. comes
C. come
D. are coming
Grammar › View
She forgot her hat, but I still have __________.
A. mine
B. whom
C. someone
D. anybody
Grammar › ViewWe’re going to school … my dad’s car.
A. by
B. on
C. in
Tenses › View
By the time she arrived at the party, everyone ____
A. Already left
B. Had already left
C. Will already leave
D. Will have already left
