题文
【山东省济宁市2015年中考英语试题】 Tom failed in the exam ag ain ____ __ he tried his best.
| A．if | B．unless | C．though | D．because |
【山东省济宁市2015年中考英语试题】 Tom failed in the exam ag ain ____ __ he tried his best.
| A．if | B．unless | C．though | D．because |
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