[ 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

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Conditionals Type IWill or Going toPresent/Past/Past ParticpleGrammar TOEFLConditionals 1,2,3Active-Passive VoicesModals for RecommendationsSuperlative AdjectivesAdjectives & PrepositionsConditionals and Modal VerbsOther quiz:
Grammar › ViewWe ____________ about the love story when our teacher entered the classroom.
A. talk
B. talked
C. were talking
D. have talked
Tenses › View
This plane _____ by the Red Baron.
A. was flown
B. will fly
C. had flew
D. have flown
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