A、Local officials. B、Prime Minister in Nigeria. C、Resident in Nigeria. D、Nigerian officials. D根据题干，该题可定位到新闻第一句。定位句指出，尼日利亚官方称，约拉市

Nigerian officials say a biggest explosion in the city of Yola has killed more than 30 people and wounded dozens of others. Martin Patience is in Logos. An eyewitness said the explosive was so loud it can be heard right across the city. The die in the angel for rush to the local hospitals.
    Reports say the blast was closed to the city’s main vegetable markets. The dry of Yola is not stranger to violence. Its twin has been hit by deadly bomb attacks this year.
Questions 3 and 4 are based on the news report you have just heard.
3. Who announced the biggest explosion in the city of Yola?
4. Where did the blast happen?