[ Past Tenses ]
Brown understood the problems of his agency because he … (work) for it since 2005.
A. had worked
B. worked
C. was working
D. had been working

Random Topics:
Verb + PrepositionComparativesModals in the Past - Speculation and DeductionMust or Mus notBasic GrammarThird Grade ExamUnreal ConditionalsCan, Could, May, MightCountable and UncountableConjunctions, Interjections and Sentence TypeOther quiz:
Prepositions › ViewLet’s go _____ a walk.
A. on
B. to
C. in
D. for
Homophone & Homonym › View
Bobby said he saw you in town today.
A. toothed cutting tool
B. past tense of see
At this time, my cats … in the yard.
A. are playing
B. is playing
C. are play
D. is play
Vocabulary › View
Lasting an indefinitely long time
A. Fresh
B. Perennial
C. Bloom
D. Nourish
