题目内容：

    A dog spent the last four years of his life waiting  a crossroad in the Thai city of Khon Kaen as if waiting for someone. People originally thought the dog had been abandoned, but then realized that he looked healthy, so people asked around about him. It turned out that the dog had indeed been spending most of his time around that crossroad, but a woman had been coming round regularly to bring him food and water.

One day, while photographing the dog everyone called Leo, a reporter met the woman who had been taking care of him. She had come to drop off some food. After learning the story about the dog and the woman, the reporter decided to share the story on social media. The post soon went viral and the photos of Leo got shared hundreds of times. And the photos reached the eyes of Leo’s former old owner.

Nang Noi Sittisarn, a 64-year-old woman from Thailand’s Roi Et Province, almost had a heart attack when her daughter showed her a photo of the beloved dog named BonBon she had lost during a car trip. When she learned that he had been waiting for her in the same spot for the last four years，her heart melted(融化).

Auntie Noi told her daughter to drive her to where the dog was waiting. When she got there and called his name. BonBon，the poor dog started wiggling(扭动)his tail and came to her，but when she tried to take him home with her, he was unwilling to follow. She didn’ t want to force the dog to come with her so she agreed to leave him with his new master. However, she and her daughter will come to visit him regularly.

1.Why did the dog look healthy after separation from his former owner?

A.He walked around the crossroad constantly.

B.He was kept at a woman’s home all the time.

C.A local reporter brought him food and water.

D.A woman looked after him on a regular basis.

2.What does the underlined phrase “went viral” in paragraph 2 probably mean?

A.Changed surprisingly. B.Spread quickly.

C.Appeared gradually. D.Fell directly.

3.How did Nang Noi Sittisam feel about the dog's waiting for her?

A.Shocked. B.Regretful. C.Touched. D.Proud.

4.What can we mainly learn from the story about the dog?

A.Unbelievable success is worth waiting for.

B.We should adjust ourselves to environments.

C.We need to learn to be faithful and thankful.

D.No one knows the result until the last minute