题目内容：

    When Randy Heiss went hiking behind his Patagonia, Ariz. farm, the last thing he expected to find was a Christmas list from a little girl across the US-Mexico border. “I found this balloon on my morning walk near Patagonia on Sunday. Attached to it was a piece of paper with the Christmas wishes from a little girl,” Heiss wrote on his Facebook page.

When he brought the list home to his wife, who speaks fluent Spanish, they determined that the little girl had asked for Enchantimals toys, clothes, art supplies and various other gifts. That's when Heiss set out to make the little girl's Christmas dreams come true. Heiss said he had attempted to send Christmas letters to Santa Claus via balloon when he was a kid but never received a response.

Heiss sent a Facebook message on Wednesday to XENY, a radio station in Nogales, to see if it could help him track down the girl or her family. He later received a response from the station, which had determined the author of the letter was an 8-year-old girl named Dayami, and the station wanted to set up a meeting between the two on Thursday. “It just changed my entire day,” Heiss told the Washington Post. “Instead of going back to my office in Bisbee, I went with my wife to Walmart. “

The couple bought almost everything on Dayami's list. They also brought a few gifts for Dayami's little sister, Ximena. They told the children they were “ ayudantes de Santa,” or Santa's helpers.

Heiss,60, said the experience was very healing for him and his wife. Nine years ago,the couple's only son died. “ Being around children at Christmas time has been absent in our lives,” Heiss said. We now have friends for life. For a day, that border fence with its concertina wire melted away.

1.How did Dayami send out her Christmas wishes?

A.By calling Heiss. B.By attaching them to a balloon.

C.By writing to a radio station. D.By sending a Facebook message.

2.When did Heiss know what the girl exactly wanted?

A.After the help of his wife.

B.When he found the balloon.

C.After their meeting in America.

D.When he got a response from the radio station.

3.What might make Heiss decide to fulfill the little girl's Christmas wishes?

A.His son's will.

B.The girls request for help.

C.His similar unsuccessful experience.

D.His desire to make friends with the girl.

4.What can we infer from the last paragraph?

A.The couple got out of the pain completely.

B.The experience was a great relief to the couple.

C.The couple would help more children from Mexico.

D.There will be no border between countries one day.