1 . The “HAPPY TO CHAT” benches help break down the invisible social b___________   that keeps people from saying hello. (根据首字母单词拼写)

2 . If you undertake the project, you are b___________   to encounter difficulties.(根据首字母单词拼写)

3 . Hearing the bad news, she________ (遮盖) her face in her hands and cried. (根据汉语提示拼写单词)

4 . The two men fought a ____________ (战斗) for land and water rights. (根据汉语提示单词拼写)

5 . After the storm, the ground was covered with many ________(树枝)．(根据汉语提示单词拼写)

6 . Hold your ________ (呼吸) for a count of five, then slowly breathe out. (根据汉语提示单词拼写)

7 . The first step of the experiment is to ________ (煮开) the ________ (液体) for 20 minutes until it has been reduced by half. (根据汉语提示单词拼写)

8 . Thanks to his hard work, several new ________ (植物的) species have been discovered since last year.(根据汉语提示单词拼写)

9 . 词性转换
1. _________ adj. 好奇的→curiously adv. 好奇地→curiosity n. 好奇心
2. ________ n. 印象，感想→impress v. 给……以深刻印象，使铭记→impressive adj. 给人深刻印象的；感人的；令人钦佩的
3. ________ n. 传统→traditional adj. 传统的
4. ________ n. 热切，渴望→eager adj. 热切的，渴望的
5. ________ v. 考察，探险→exploration n. 考察，探险→explorer n. 探险家
6. ________ n. （一批）收藏品→collect v. 收集→collector n. 收藏家，采集者
7. ________ v. 组织→organisation n. 组织，团体→organised adj. 有组织的，有条理的
8. ________ v. 呼吸→breath n. 呼吸；气息；呼吸的空气→breathless adj. 气喘吁吁的，上气不接下气的
9. ________ n. 挑战→challenging adj. 挑战性的
10. ________ n. 描述，描写，叙述，形容→describe v. 描述，描写
11. ________ adj. 有信心的，自信的→ confidence n. 自信

10 . Through a little hole the children entered the garden, and they were sitting on the b_________ of the trees. (根据首字母单词拼写)