[ 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 and Prepositional Phrases › ViewWhat is the preposition? Under a warm blanket, Pam rested.
A. under
B. blanket
C. rested
D. Pam
Grammar › View
Correct or incorrect? The movie was so good so she decided to rent the sequel.
A. correct
B. incorrect
Progressive Tense › ViewAt 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
