[ Grammar and Vocabulary ]
How long ______________ studying food processing techniques for the company when he retired?
A. did Martin work
B. had Martin worked
C. had Martin been working

Random Topics:
Wh- Questions Present Simple TensePassive Voice with ModalsBecause of & Inspite ofAdjective or AdverbQuestion Tags in Verb TensesLinking Verbs and TensesPresent Perfect and Past TensesTransitional WordsPast Tense and NeutralAdjective & AdverbsOther quiz:
Grammar › ViewIdentify the verb in this sentence:
The tiny baby is happy.
A. tiny
B. is
C. baby
D. happy
Types of Sentence Structures › View
We continued our vacation trip when the dense fog lifted.
A. simple
B. compound
C. complex
D. compound-complex
Subject-Verb Agreement › ViewMy shears … sharp enough.
- aren’t
- isn’t
Present and Past Tenses › View
During the meeting, the CEO ________ (interrupt) and ________ (announce) the company’s restructuring plan.
A. interrupted / announced
B. interrupted / was announcing
C. was interrupting / announced
D. was interrupting / was announcing
