9. Read the passage.
Mushrooms
Most Americans are familiar with the mushrooms they eat on a pizza or in a salad. But beyond that, most people know very dittle about this popular fungus. More than
3,000 different types of mushrooms are grown around the world. Some mushrooms are less than an inch high, while others are more than 15 inches tall. They have
strange names like shiitake , Portobello and Black Trumpet . Until World War II, most mushrooms were grown in Asia, where they were used in soups and vegetable
dishes. But today, the United States is the world's largest supplier of mushrooms. From 1986 to 1999, worldwide mushroom production grew from 470 million pounds
to 860 million pounds.
What is this paragraph's implied main idea?
Before World War II, most mushrooms were grown in Asla.
Many Americans do not know much about mushrooms.
C
Mushrooms are good for one's health.
All mushrooms have strange names.