15.（单选题）A large percentage of e-commerce business went bankrupt in 2000, mostly due to inadequate business plans and excessive spending on advertising and marketing.

37.（单选题）Jacky is an _______ scholar who published several important papers last year.

36.（单选题）We should focus on _______ in learning English.

35.（单选题）College students can make their choices ____________ in many things.

34.（单选题）Most governments realize that national economies aren’t ___________ of each other.

33.（单选题）Steven planned to carry on a small amount of _________ with his friends.

32.（单选题）They have offices in the ___________ heart of the city.

31.（单选题）Everyone should _______ his/her duty to help the company.

30.（单选题）Some software programs have a very powerful __________ .

29.（单选题）Many fashions are _________ on the website.

28.（单选题）Nowadays, Internet _________ is a rapidly developing industry in China.