[ Tenses ]
Not until Trang ______ the labour market was she aware of the importance of being patient.
A. enters
B. has entered
C. had entered
D. is entering

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Mix-Tenses › ViewLast year, Mr.Yok stayed in London for two weeks, ______ there?
A. Had you
B. Did he go
C. Was he gone
D. Has he been
Grammar & Vocabulary › View
. In contrast, a ___________ usually has more than one person or many people who work together. The business is separate from the owners, so they can buy or sell it if they like.
A. shares
B. company
C. firms