【正文】
f them. His father was a farmer, and being a sailor could never be anything for the boy but an idle dream. One day, on his usual wandering, he heard the captain of the ship plaining that he could not sail because one member of his crew was sick. Without stopping to think, the lad(少年)offered to take his place. 73 . 74 .If the lad had gone home to ponder(考慮) his decision for a week, he may have missed his chance. It is one thing to be offered an opportunity。 Choosing the right job is probably one of the most important decisions we have to make in life, and it is frequently one of the hardest decisions we have to make. One important question that you might ask yourself is: “How do I get a good job?” 71 . There are people who can answer an insignificant advertisement in the local paper and land the best job in the world。Before going outside in the morning, many of us check a window thermometer(溫度計)for the temperature. This helps us decide what to wear. 71 . We want our food to be a certain coldness in the refrigerator. We want it a certain hotness in the oven. If we don’t feel well, we use a thermometer to see if we have a fever. We keep our rooms a certain warmth in the winter and a certain coolness in the summer.Not all the thermometers use the same system to measure temperature. We use a system called the Fahrenheit scale. But most other countries use the Centigrade scale.Both systems use the freezing and boiling points of water as their guide. 72 .The most mon kind of thermometer is made with mercury(水銀)inside a clear glass tube. As mercury (or any other liquid ) bees hot, it expands. As it gets colder, it contracts(收縮). That is why on hot days the mercury line is high in the glass tube. 73 .First. Take a clear glass juice bottle that has a cap。四、實戰(zhàn)演練1根據(jù)短文內(nèi)容,從短文后的選項中選出能填入空白處的最佳選項。