题文
Last year the number of students who graduated with a driving licence reached 200, 000, a (n) __________ of 40, 000 per year.
| A．average | B．number |
| C．amount | D．quantity |
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Last year the number of students who graduated with a driving licence reached 200, 000, a (n) __________ of 40, 000 per year.
| A．average | B．number |
| C．amount | D．quantity |
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