A、On Christmas Day. B、On December 19th. C、In winter. D、On a windy day. B新闻中提到林区火灾是由雷击引发的，发生的时间是12月19日，故答案选B项。新闻开头提到，圣诞节期间的天气加剧了灾

Hundreds of residents and holidaymakers along southern Australia’s popular Great Ocean Road were forced to move out on Thursday as hot, windy weather threatened to recharge bushfires that destroyed more than 100 homes on Christmas Day.
    Residents in three coastal towns in the popular holiday area were advised to leave their homes as temperatures were forecast to reach a high of almost 40 degrees Celsius. The hot summer weather threatened to expand fires that have been burning for almost two weeks.
    The fires were started by a lightning strike on Dec. 19 and continue to burn and spread. The Country Fire Authority estimates the fire has burnt out more than 25 square kilometers of land. Authorities estimate that 116 homes were destroyed by the fires on Christmas Day.
    The Great Ocean Road is one of Australia’s biggest tourist draws with its spectacular scenery and unusual offshore rock formations. Parts of the road remained closed to traffic on Thursday during what is typically one of its busiest times of the year.
5. What happened on Australia’s Great Ocean Road on Thursday?
6. Why should the local residents leave their homes?
7. When did the bushfires start?