My sister Sarah told me an unusual experience about a special test. She had it in the first year of her middle school.

It was a few minutes before the final history exam. Jenny and her classmates were in the classroom. waiting for ________ history teacher Mr. Smith to come. Although everyone worked really hard at history, some of them were still a little ________ as Mr. Smith was a strict teacher. When it was 8 o’clock, Mr. Smith came with the exam papers ________ his hand. He said, “I know how hard you have worked for this test and you all can do it well, so you can get a B if you don’t want to take the test.”

Many students jumped up to thank Mr. Smith and left the classroom. Mr. Smith ________ the rest of the students and said, “Does ________ else want to get a B? This is your last chance.” Two more students decided to go.

Jenny and other seven students were still in the classroom. Mr. Smith then handed them the ________.

They all felt so ________ because there were only three sentences on the paper, “Congratulations! You get an A in this test. Keep believing in yourself.”

I think Jenny is so lucky because she had such a test and a good ________. It is true that the students who do not believe in themselves are usually B students or maybe even worse. The A students always believe in themselves. They have learned more and have become ________ people. All of us should remember ________ we learn from the teacher.

Very hot weather is common in many parts of the world. Although hot weather just makes most people hot, it can cause medical problems and death.

Floods, storms and other terrible natural events kill thousands of people every year. And we hear much about them in news reports. We general hear little about heat（热）, which experts say may be nature’s most dangerous killer.

Health experts say that since the year 1900, very hot weather has killed more people in the United States than any other natural event. One year—the unusual hot summer of 1980 heat caused about 1,700 deaths in the United States. In 1955, more than 600 people died in another heat wave in one city—Chicago, Illinois.

Besides drinking lots of cool water, doctors say there are some other things to do to protect against the health dangers of heat. Stay out of the sun, if possible. Wear loose and light-colored clothes. Wear a hat while in the sun. Eat fewer hot and heavy foods. And, cook foods during cooler time of the day. If possible, rest more often.

Health experts say these simple steps can prevent the dangerous health problems caused by heat. They will prevent sickness, help you feel better and may even save your life.