2. As we all know,great scientific achievements are the results of years of trying to create something        before (exist)

正如我们所知道的，伟大的科学成就缘于多年努力去创造某些以前不存在的东西。

1. We ask all our customers        the service they received. (satisfied)

我们问所有顾客他们是否对服务感到满意。

10. I should thank you        speaking here and for ensuring me such an attentive audience.

   A. for the privilege of   B. on behalf of

   C. because of   D. in consideration of

9. The police are trying to        the jewel thieves and bring them to justice.

   A. find fault with   B. call for

   C. make out   D. round up

8. On Valentine's Day John bought Mary,his girlfriend,whatever she wanted,         the expense.

   A. in spite of   B. regardless of

   C. by means of   D. instead of

7. For thousands of years,many popular poems were written        the Yellow Crane Tower,thus making the Tower so renowned that it becomes a combination of wine culture and tourism.

   A. in terms of   B. in praise of

   C. as the result of   D. in response to

6. Eastern Europe also faces serious challenges of lower oil prices and        economic downturn that will result in severe economic hardship ahead.

   A. local   B. magical

   C. sharp   D. artificial

5. She maintains a/an        attitude towards her situation and never loses hope for life.

   A. positive   B. negative

   C. attractive   D. sensitive

4. Though we have mentioned the practical use of this plan again and again,he        to discuss it at the meeting,which made us very disappointed.

   A. agreed   B. declined

   C. expected   D. got

3. I        of your trying to earn some money,but please don't neglect your studies.

   A. approve   B. complain   C. think   D. speak