WHILE MY MOTHER _______ AFTER THE BABY, I _______ IN THE KITCHEN.A...

20. While my mother _______ after the baby, I _______ in the kitchen.

A. took/ was cooking

C. was taking/ was cooking

B. was taking/ cooked

D. had taken/ was cooking

C. COMPREHENSION READING

Carbohydrates, which are sugars, are an essential part of a healthy diet. They provide the

main source of energy for the body, and they also function to flavor and sweeten foods.

Carbohydrates range from simple sugars like glucose to complex sugars such as amylose and

amylopectin. Nutritionists estimate that carbohydrates should make up about one-fourth to

one-fifth of a person’s diet. This translates to about 75-100 grams of carbohydrates per day.

A diet that is deficient in carbohydrates can have an adverse effect on a person’s health.

When the body lacks a sufficient amount of carbohydrates it must then use its protein

supplies for energy, a process called gluconeogenesis. This, however, results in a lack of

necessary protein, and further health difficulties may occur. A lack of carbohydrates can also

lead to ketosis, a build-up of ketones in the body that causes fatigue, lethargy, and bad breath.