Silk from China found its way to India, the Middle East and Rome, spices(香料) and glass, which was not known to China.
33.The big city has always been the dream career destination of college students. But of late a trend of heading back home ________a part of future job considerations.
32. A severe drought over the past months has left 7.5 million people without ________ drinking water in two southwestern Chinese provinces.
31. Stronger and more lasting memories are likely to be formed ________a person is relaxed.
30. British scientists said teenagers are programmed to take risks because they enjoy the thrill of dangerous situations________ others.
29.Everyone wants to live in a beautiful, comfortable and “livable ” place, but not ________ know where it is.