题目内容：

It is two in the morning. The wind is getting stronger and there is a chance that it will rain. Though the weather is bad, Al Gehrke sits 110 floors above the ground, 442 meters above the earth. You may be wondering what he is doing so far off the ground. If you asked him, he would say, “I am just doing my job!”

Al Gehrke has a very special job that not many people would want to have. He manages one of the tallest buildings in the world — the Wills Tower in Chicago. His team washes and changes the windows. The Wills Tower has 16, 000 windows and each window weighs over 90 kilos. Gehrke and his team work from seven in the evening until four in the morning. They clean 18 windows each night. Each window takes almost 30 minutes. Al Gehrke is not afraid of high places and he is a good man for the job.

Mary Ann also has an unusual job. Instead of hanging high above the earth washing windows, she works under the water. She trains dolphins for shows and also helps people to swim with the dolphins. She loves the dolphins. “We never tell a dolphin what to do. We ask them respectfully. They decide to do that for us because of the relationship we have,” she said.

Besides washing windows high above the earth or swimming with big fish under the water, there are other unusual jobs that you have probably never thought of people having. Here is another strange example: karaoke singers! A karaoke singer is someone who sings the songs of famous singers. The singer is able to follow the words of the songs because they appear on a computer in front of them. In Cyprus, karaoke singers are very popular. They sing to the people on holiday. As the visitors travel around the island they can listen to the music of the karaoke singers.

1.By saying “I am just doing my job” in Paragraph 1, Al Gehrke is most likely to tell us      .

A. his job is difficult to do    B. he is brave and strong

C. he can make much money    D. his job is nothing special

2.According to the third paragraph, Mary Ann        .

A. considers herself unusual    B. teaches people how to swim

C. has a great love for dolphins    D. works long hours every day

3.The writer is trying to introduce some unusual jobs by       .

A. holding some activities    B. offering some examples

C. comparing several ones    D. telling some funny stories