In Europe, most capital cities     1    （plan)and built before cars,and city centre traffic jams     2    （be)part of daily life for a long time.The situation in central London,     3    drivers spent fifty percent of their time in queues,became so bad     4     the local government decided to do something about it.In February 2003 the mayor of London introduced a"congestion charge"-a tax for cars     5    （enter)the centre of the city.

All-out search and rescue efforts were underway on Monday     1     a China Eastern Airlines aircraft     2     (carry) 132 people crashed in South China’s Guangxi Zhuang autonomous region in the afternoon — ending China’s 12-year air safety record.

Flight MU5735 left Kunming, capital     3     Yunnan province, at 1:11 pm and     4     (schedule) to arrive in Guangzhou at 3:05 pm. Air traffic controllers lost track of the plane over Wuzhou, Guangxi.     5     flight was carrying 123 passengers and 9 crew members. In the afternoon, fire and rescue teams discovered aircraft debris scattered in the forest. No     6     (remain) of passengers had been found yet.

President Xi ordered swift action to be taken     7     (find) out the cause of the crash     8     to strengthen the safety of the civil aviation sector (航空业) to ensure the     9     (absolutely) safety of the sector and     10     (people) lives.

China has built a high-speed passenger rail network in recent     1     (year) and will continue to expand it. By the end of 2018, China’s high-speed railway mileage (总长度)     2     (reach) 29,000 kilometres. This accounted for 2/3 of the world’s total high-speed rail tracks,     3     (make) China’s high-speed rail system become the world’s     4     (large) high-speed rail network.

China’s high-speed trains are similar     5     those of France’s TGV, German’s ICE and Japan’s Shinkansen. The fast train     6     top speed is 250-350 km/h is called CRH, China Railway High-speed.

If you want to travel around China, the high-speed trains will be your ideal choice since they are clean, comfortable     7     modern. Unlike the old trains in the past in China, nobody is allowed     8     (smoke) on high-speed trains, not even between carriages.

The seats are as good as those on the plane or even better. Most high-speed rail tickets have corresponding (对应的) seats, and only     9     small number of standing tickets are sometimes sold on limited trains. The ticket prices for China’s high-speed trains are reasonable, and people can buy tickets     10     (convenient).