单选题 .  Questions 6 to 10 are based on the following news.
6. 
【正确答案】 C
【答案解析】 [听力原文]
Victoria, Australia
   The Victoria State Emergency Service has received more than 1,500 calls for help as heavy rain continues to fall across the north-east of the state and authorities prepare for possible evacuations in the north-east. The state is enduring what the weather bureau says an "unprecedented" deluge that could bring three months' of rain in three days, with another 150 millimetres forecast to fail in some areas.
   While the threat has eased somewhat in Melbourne, emergency workers are paying particular attention to the north-east ranges, where significant flooding is expected and warnings have been issued for a number of rivers, including Ovens River, Seven and Castles rivers, and the Kiewa River.
   People have been advised to prepare to evacuate low-lying areas of Myrtleford along the Ovens River, and a relief centre has been opened at the Myrtleford Senior Citizens Club. The SES said evacuations were expected to take place later today.
Potsdam, Germany
   Police in the German city of Potsdam are investigating a device filled with nails found next to a Christmas market. The device, that also held batteries and wires, was sent to a pharmacy in Berlin. Police initially said there were explosives inside, but then clarified there was no detonator.
   In last December's Berlin Christmas market attack, Anis Amri, an asylum seeker, hijacked a lorry and killed its driver before ramming it into shoppers, killing another 11 people.
   The device was found near Brandenburgerstrasse in the centre of Potsdam, which has a number of other Christmas markets. A police spokesman said an X-ray scan was conducted on the device, which found that it had nails inside. It was then made safe.
   The Interior Minister for Brandenburg, Karl-Heinz Schroeter, said police were searching the area in case more devices were sent.
Mar del Plata, Argentina
   Argentina has given up on rescuing 44 crew members on a submarine that disappeared last month, but will continue the search for the vessel with international assistance, a navy spokesman said. The ARA San Juan had been ordered to return to a naval base in Mar del Plata after reporting that water had entered the vessel through its snorkel. Some family members criticisd the government for giving up, and had held out hope for a miracle and were organising prayer groups together. The San Juan, a German-built diesel-electric TR-1700 class submarine, was commissioned in the 1980s and was most recently refitted in 2014. During the MYMUS12 million retrofitting, the vessel was cut in half and had its engines and batteries replaced. Experts say refits can be difficult because they involve integrating systems produced by different manufacturers, and even the tiniest mistake during the cutting phase can put the safety of the ship and crew at risk.
Washington DC, USA
   A large flying object expected in December has caught NASA's attention, but it isn't Santa Claus' sleigh. Instead, an asteroid called 3200 Phaethon is projected to come close enough to Earth that it's been classified as "potentially hazardous". The asteroid has a diameter of about 3 miles, according to NASA, making it the third-largest "potentially hazardous" asteroid to pass by Earth. NASA expects Phaethon to be the closest to Earth on Dee. 16, when it's projected to be more than 6.4 million miles away. It will be the closest this asteroid has been to Earth since Dec. 16, 1974, when it was just over 5 million miles away. But humans weren't aware of its presence until later; the asteroid was first discovered in 1983. It's not expected to be this close to Earth again until 2093, when it's projected to pass more than 1.8 million miles away. At its closest approach, Phaethon may be visible with a small telescope in dark skies.
New York, United Nations
   The United Nations has appealed for a record $22.5bn (£17bn) in humanitarian aid for 2018. The global aid appeal aims to raise funds to help 91 million of the world's most vulnerable people, out of 136 million in need, a UN statement said. More than $10bn is needed to address the humanitarian crises in Syria and Yemen alone, it added. The UN also said needs are rising substantially in a number of African countries. Driven by conflicts in Africa and the Middle East, the number of people in need of humanitarian aid has increased by more than 5%, according to UN co-ordinator Mark Lowcock. The targeted fund is a 1% increase on the amount requested last year. For 2018, however, it is a record $22.5bn in humanitarian aid.
   What has happened to Victoria State, according to the news?