the Green Great Wall, farmers gain more crops.

    The picture that sits on my desk in my bedroom is my favorite.

    (A) When I have trouble studying or I'm worried about an exam, I always take a look at it. It is a picture of my best friends taken three years ago when we were in middle school. It reminds (使……想起) me of the good time we've shared and the support (支持) their friendship still gives me today, Our lives have gone in different directions, (B) ___________ our friendship we created has kept us close. Every week I get a message on my answering machine from one of them, or a letter in the mail with the latest news or vacation photos. I often get an email with a joke for the day or words of comfort about some problems in my life. My friends often show up for surprise birthday parties，and one of them (C) ___________ travelled two hours from the other end of the town just to watch my first English speech contest. Our friendship has carried me through a lot of difficult experiences, and has enriched the good ones.