第 26 至 30 題為題組 Nutritional products that can be collected from trees include fruits, nuts, seeds, leaves, and bark. Tree
products have been an important part of diets for thousands of years, from early humans ____26____ fruits and
nuts to the first cultivation of important trees, such as mango and apple.
The apple is one of the world’s most cultivated fruit trees, ____27____ over 7,000 different kinds in
existence. Despite their great ____28____ , however, most domesticated apples can be traced back to a common
ancestor, the wild apple of Central Asia, Malus sieversii. Apples have been grown for thousands of years in
Asia and Europe, and ____29____ to North America by European colonists in the 17
th century. Today, apples
are ____30____ eaten the world over and form the basis for multi-million dollar industries. In 2005, at least 55
million tons of apples were grown worldwide, which generated a value of about $10 billion.
【題組】28.
(A) variety
(B) harvest
(C) condition
(D) discovery