Ⅲ.標出主題句(15 points，5 points each)

　　16.Choose the best topic sentence from the group below by writing A，B，C or D.

　　A. Obesity can cause a range of psychological problems.

　　B. The BMA report highlighted a physical problem obesity causes.

　　C. Adults are overweight if they have a BMI index over 30.

　　D. The charity Weight Concern emphasizes the problems of child obesity.

　　Answer：___________________________________________________________________

　　17.Read the following paragraph and underline the topic sentence.

　　There are several ways for a kid to save money. Many banks offer free savings accounts for children. A great way to utilize your savings account is to deposit a specific amount of your allowance each month. The amount is not much but will add up and help you out a little over time! A lot of banks that offer kids accounts require a parent’s signature if the kids want to withdraw money from their savings. This means the bank account might be a little inconvenient when it comes to purchasing your wanted items. If you would rather have full authority over your money，or if you cannot find a kids’bank plan that you like，there are ways for you to save money at your home .A great way to save money at home is to put a portion of your allowance in a cookie jar or piggy bank in your room. Another way to save money is to put all of your coins in a piggy bank. Coins can collect fast and add up to a lot of money!

　　18.Read the following paragraph carefully and choose the best topic sentence from the four possible answers that follow the paragraph by writing A，B，C or D.

　　In most animals and humans，the desire to sleep is brought on by secretion of a hormone called melatonin. Melatonin is produced in a tiny gland known as the pineal gland. In the evening，the pineal gland reacts to the diminishing levels of daylight and starts to produce melatonin，which is then released into the blood and flows through the body making us drowsy. Its secretion peaks in the middle of the night during our heaviest hours of sleep. In the morning，bright light shining through the eye reaches the pineal gland which reacts by switching off the production of melatonin，thus removing the desire to sleep.

　　A. Chemicals are important in our body.

　　B. The pineal gland is linked up to other parts of our body.

　　C. Light determines our sleep/wake cycle.

　　D. Melatonin directs various functions of our body.

　　Topic sentence:_______________________________________________________________