1 . The secret of happiness is to think about positive things and stay o________．（根据首字母单词拼写）

2 . The secret of happiness is to think about positive things and stay ________(乐观的). (根据汉语提示单词拼写）

3 . He was soon back on his feet in such a comfortable s________(环境) with so many beautiful trees and flowers. (根据汉语提示单词拼写）

4 . His first speech as president made a strong i________ on his audience. (根据首字母单词拼写)

5 . He was ________(不乐意) to face the fact that he had lost, and left without a word. (根据汉语提示单词拼写）

6 . England is the largest of the four countries and for c________it is divided into three zones. (根据首字母单词拼写)

7 . Only if you put the sun there did the movements of the other planets in the sky make s________.(根据首字母单词拼写)

8 . The boss is ________(小心谨慎的) about making promises. (根据汉语提示单词拼写）

9 . The old man was utterly ________(吸引) in the book. (根据汉语提示单词拼写）

10 . If a student ______ (缺乏) the motivation to study，he or she will quickly become tired of studying. （根据汉语提示单词拼写）