题目内容：

阅读下面短文，在空白处填入 1个适当的单词或括号内单词的正确形式。

The Forbidden City in Beijing, home to the Palace Museum, houses more than 1.8 million cultural relics and is one of the world’s most visited tourist attractions.

1. (mark) the 600th anniversary of the Forbidden City, the Palace Museum will hold a series of events throughout 2020. Over 20 exhibitions will be held, 2. (cover) different areas such as history, art, festivals, and so on. For the special occasion, Along the River during the Qingming Festival, one of China’s most 3. (wide) known masterpieces, will go on display in September 2020. For 4. (it) best preservation, this treasured artwork is seldom fully exhibited. The painting 5. (display) for the first time back in 2005 to celebrate the museum’s 80th anniversary. Such 6. rare sight is expected to draw huge crowds.  In addition, the museum will also display exhibits from other 7. (country).

During the past few years, the Palace Museum has been working hard to get the public familiar 8. the history and culture of the Forbidden City. And it seems that these efforts have been paying off, with its 9. (popular) reaching a new height. Over 17 million people visited the museum in 2018, of 10. 40 percent were under 30 years old.