1 . He could have made a good pilot but his drinking habit was his ______ (致命的弱点). （根据汉语提示完成句子）

2 . Both sides signed a contract of three years’ ________ (持续时间). (根据汉语提示单词拼写)

3 . I wonder if you can give me a ________________(描述) of that celebration the other day. （根据汉语提示单词拼写）

4 . Mr. Green has _____________ (树立榜样) to all of us by helping those homeless people selflessly. (根据汉语提示完成句子)

5 . Studying is not easy, but you will get over tough times with your determination and mental s________(力量，意志力). (根据中英文提示单词拼写)

6 . The professor warned the students that on no ______ (accountant) should they use mobile phones in his class. (所给词的适当形式填空)

7 . Facing the _____ (possess) left to him by his father, the man had a mixture of emotions. (所给词的适当形式填空)

8 . The Chinese national park system will be the largest in the world in terms of _______(cover), biodiversity and public participation. (所给词的适当形式填空)

9 . He donated his entire ________ (collection) to the museum. (所给词的适当形式填空)

10 . He put all his _________ (saving) into buying a boat. (所给词的适当形式填空)