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Tough __________ the task was, we _______ finish it ahead of time and therefore we were highly praised for it.
A. though; would B. although; had to C. as; were able to D. though; must
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—Will you be invited to visit Beijing next month?
—I'm still hoping ________.
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完形填空．
Located in Shaanxi Province, Xi'an is an important ___1___ of science and technology, culture, education, trade and finance as ___2___ as modern processing（加工）base. ___3___ a population of more than 7 million, Xi'an takes ___4___ an area of 10,108 square kilometers. ___5___ Chang' an in Chinese history, Xi'an was once the capital of 13 dynasties and ____6__ a similar honor as other famous historical cities in the world ___7___ Rome and Athens.
The ___8___ Silk Road started there 2,100 years ago, and ___9__ the city into a trade center that connected China with ___10___ countries.
The splendid history has blessed the city with numerous valuable relics ___11___ the Qin Terracotta Warriors and Horses and the ancient city walls from the Ming Dynasty.
Together with gorgeous natural scenery, those historic sites ___12__ a powerful boost（促进）to the tourism Industry in Xi'an, which ___13___ an important part in the local economy.
The city has 56 hotels rated in the tourist-star system which ___14___ foreigners and 174 travel agencies open today.
Besides tourism, the time-honoured city has also made ___15___ progress in terms of local economy, ___16___ research and city construction advancement in the past 50 years.
With a (n) ___17___ of 13 percent in the gross domestic product (CDP) for 10 continuous years, Xi'an ___18___ a comprehensive industrial system of its own.
There are now 43 colleges and more than 660 scientific institutions in Xi'an. Each year it turns ___19___ about 3,000 research achievements or patents（专利）. The city's comprehensive technological power ranks ___20__ in China, next to Beijing and Shanghai.