[ Present and Past Tenses ]
It started to snow while we … to school.
A. had walked
B. have walked
C. have been walking
D. were walking

Random Topics:
Conditionals Type IWill or Going toPresent/Past/Past ParticpleGrammar TOEFLConditionals 1,2,3Active-Passive VoicesModals for RecommendationsSuperlative AdjectivesAdjectives & PrepositionsConditionals and Modal VerbsOther quiz:
Quantifiers › ViewThe company sells at festivals hosted by _____ different organizations.
A. plenty
B. a number of
C. no
Grammar › View
Which sentence is correct?
A. There isn’t a one computer in this office.
B. There isn’t a single computer in this office
C. There isn’t an only computer in this office.
Regular vs. Irregular Verb › Viewto MEET
A. Ment
B. Meet
C. Met
Tenses › View
He hasn’t written a letter yet.
A. Future Simple
B. Present Perfect
C. Past Simple
D. Present Continuous