1 . The school offers students a wide v________ of extra-curricular activities. （根据首字母单词拼写）

2 . Mr.Lee gives advice to students who want to study abroad and apply for ________ (交换) programs. （根据汉语提示单词拼写）

3 . Through t________ and error, Tu Youyou ultimately extracted a substance that worked. （根据首字母单词拼写）

4 . There’s a growing ________ (信念) that parents should let children make their own mistakes. （根据汉语提示单词拼写）

5 . C___________! We are happy to inform you that you have won the speaking competition.(根据首字母单词拼写)

6 . Many moms face the d___________ about whether they should go back to work or not. (根据首字母单词拼写)

7 . For nearly four ___________ (十年), the village remained undisturbed. (根据汉语意思单词拼写)

8 . The college attracts students of all ________ (国籍)．（根据汉语提示单词拼写）

9 . Sarah chose to take the stairs and when reaching the 20th floor, she felt out of b___________. (根据首字母单词拼写)

10 . The forest's dense ________ (生长) provides nesting places for a wide variety of birds.（根据汉语提示单词拼写）