题目内容：

When you give thanks for help，everyone benefits. And the ____ will last longer than you expect:researchers have found that writing thank­you notes raises people's ____ levels for up to six months.

“If you express gratitude in a diary，it makes you happier，but if you ____ it with the person who helped you, it has the ____ to bring you two closer together,” says researcher Jeff Tsang.

Lawyer John Kralik experienced this personally. He'd been feeling depressed and ____ about his life: He'd been divorced and wasn't ____ with his children. He felt tired from the ____ hours he devoted to work. At a/an ____ low point, he remembered his grandfather telling him about the importance of ____. He decided to write 365 thank­you notes over 365 days, hoping for a/an ______ change.

Immediately, he noticed his ____ begin to improve.“The first effects are that you realize that your life is much better than you thought and you become more positive,” Kralik says of his ____ acts of expressing thanks.

___ by Kralik's experience, I decided to try the ____ myself. I chose someone from my past whom I'd ____ thanked before: my wonderful high­school English teacher. I wasn't sure if I'd be able to ____ him，but eventually I found where he lived.

In my letter, I thanked him for the ____ and support that he'd given me years earlier. I may never hear from him ____, but that isn't the ____. The letter helped me ____ my life, and I've been happy now for months.

1.A. time    B. thoughts    C. effects    D. relationship

2.A. education    B. happiness    C. income    D. health

3.A. share    B. complete    C. compare    D. leave

4.A. method    B. desire    C. energy    D. potential

5.A. discouraged    B. dishonest    C. impatient    D. surprised

6.A. bored    B. strict    C. close    D. honest

7.A. limited    B. valuable    C. delightful    D. long

8.A. importantly    B. particularly    C. physically    D. exactly

9.A. forgiveness    B. achievement    C. gratefulness    D. patience

10.A. positive    B. unexpected    C. possible    D. instant

11.A. wealth    B. attitude    C. position    D. competence

12.A. generous    B. strange    C. brave    D. simple

13.A. Struck    B. Inspired    C. Shocked    D. Invited

14.A. idea    B. belief    C. letter    D. test

15.A. nearly    B. frequently    C. already    D. never

16.A. remember    B. recognize    C. locate    D. reward

17.A. degree    B. money    C. gift    D. guidance

18.A. in advance    B. in public    C. in return    D. in person

19.A. case    B. point    C. fact    D. solution

20.A. appreciate    B. understand    C. face    D. review