[ Perfect and Past Tenses ]
Mary (work) __________ at the same company for ten years before she got a promotion.
A. worked
B. was working
C. has been working
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Grammar › ViewYou would have told me the secret_________
A. If you trust me
B. If you trusted me
C. If you had trusted me
Present Perfect and Present Perfect Continuous › View
I have known my best friend …… six years.
A. for
B. since