A、Before he takes charge of the economic work. B、Before he delivers a speech to Congress. C、After he won the power to intervene

The Venezuelan government has announced a 60-day economic emergency to deal with the country’s worsening crisis. If passed by the National Assembly, it would give the president wider powers to intervene in companies or limit access to currency. The order includes tax increases and puts emergency measures in place to pay for welfare services and food imports. Official figures suggest that the Venezuelan economy had contracted by 4.5% in the first nine months of 2015. The emergency was declared hours before President Nicolas Maduro delivers a State of the Nation address to Congress for the first time since his centre-right opponents took control of the legislature. Venezuela has the world’s biggest known oil reserves but the huge fall in oil prices in the past 18 months has slashed its revenues by 60%. Annual inflation up to September is said by the Venezuelan Central Bank to have reached 141%.
5. What is the purpose of Venezuela to announce a 60-day emergency?
6. When did the president declare the emergency?
7. What has reduced Venezuela’s revenues greatly?