1 . Going from junior high school to senior high school is a really big ________ (挑战) . （根据汉语提示单词拼写）

2 . To most g________ the yearbook is a treasured souvenir of high school days. (根据首字母提示拼写单词)

3 . Ellis Island has become one of America’s most popular tourist d________. （根据首字母单词拼写）

4 . The performance of the talented singer left a deep i________ on the audience, and they could not stop talking about it for days. (根据首字母单词拼写)

5 . The immune system is our main ___________ (防御) against disease. (根据汉语提示单词拼写)

6 . Hotel ______________(食宿) is included in the price of your holiday.（根据汉语意思填空）

7 . The f_________ of the heart is to pump blood through the body. (根据首字母单词拼写)

8 . Zhong Nanshan, a medical scientist, has made a great c_____________ to the control of the COVID-19. (根据首字母单词拼写)

9 . We should make a good ________ (印象) on our teachers on the first school day. (根据汉语提示单词拼写)

10 . Representatives from over 100 countries attended the c___________ to discuss the problem of wildlife protection. (根据首字母单词拼写)