1 . When he closes his book, it’s a ________(信号，标志) for everyone to stand up and leave right now.(根据汉语提示单词拼写)

2 . As ordinary people, we all have our own likes and __________(不喜欢).

3 . In my __________(观点), everyone, whether rich or poor, is born equal.

4 . The railway ________(轨道) are now useless pieces of steel.

5 . In Chinese culture, calligraphy is highly regarded as a ________ (象征) of artistic expression and cultural identity. (根据汉语提示单词拼写)

6 . Keeping balance between studying and hobbies can be a ________(挑战) for many students. (根据汉语提示单词拼写)

7 . 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)

8 . Jordan says that the secret to his success is learning from his ________(failure). (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 . No money can be spent on the ________ (construct) and operation of the shopping mall. (所给词的适当形式填空)