题目内容：

请根据句子的意思和汉语提示完成下列句子，每空只填一个单词。

1.You’ re likely to realize your dream, but there’s also ________ (可能性) for you to fail even if you work rather hard.

2.One of the ________ (挑战) tasks that all governments are facing now is how to develop economy rapidly without harming the environment.

3.The great scientist did a lot of ________ (科学的) researches without stopping, finally he succeeded in finding the efficient approach to cure the disease.

4.The doctors advice has ________ (加强) my determination to get rid of the bad habit of staying up too late in the evening.

5.Recently, the government is considering a suggestion that ________ (青少年) should be banned from driving at night.

6.My cousin gave me a detailed ________ (描述) of what he had heard and seen when he came back from the sightseeing trip.

7.After working and living in Beijing for some time, the Smiths have become ________ (永久的) Beijing citizens.

8.Maria has served our family ________ (忠诚地) for a decade, and I think she is a good and honest friend of ours.

9.If your dream is to become an excellent ________ (钢琴家), wouldn’t you have rather tried and failed than not tried at all?

10.She had a hatred for her father at that time but she ________ (最后) came to understand him and his strong love for her.

11.The greatest historical treasure of all is London with its museums, art ________ (收藏品), theatres, parks and buildings.

12.George’s calmness and wisdom made a very good ________ (印象)on us, so we chose him as our group leader.

13.She went to Oxford University for her further education. ________ (同时), most of her friends got well-paid jobs.

14.“Please keep me well ________ (通知) of what happens,” he said before he hung off.

15.She was quite all right except for some minor ________ (外伤) to her face.