[ Grammar ]
The teacher had barely started the lesson when the bell rang. (Use: No sooner…than)
A. No sooner had the teacher started the lesson than the bell rang.
B. No sooner did the teacher start the lesson than the bell rang.
C. No sooner the teacher had started the lesson, than the bell rang.
D. No sooner had the teacher started the lesson when the bell rang.

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Choose the best option to fill in the gap: Has Tony’s book ____________ yet?
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