(
C
) 1. What is the cause that makes human skin change colours according to paragraph 2?
A. Sunshine. B. Feeling. C. Pigment. D. Blood.
(
D
) 2. What can plants use to attract insects according to paragraph 3?
A. Leaves. B. Fruits. C. Pollen. D. Colours.
(
B
) 3. What does the underlined word "predators" in paragraph 4 mean?
A. Animals which hide in secret places.
B. Animals which kill other animals for food.
C. Animals which change colours with the sun.
D. Animals which protect themselves from danger.
(
B
) 4. What is the structure of the passage?
答案：1. C
2. D
3. B
4. B
1. 這是一道細節(jié)理解題，需要從文章第二段中找到關于人類皮膚顏色變化原因的信息。文中明確提到“Human skin can be many different colours and it changes with the sun, our feelings and our health. This is because of pigments(色素), which reflect light and make what the eye sees as colours.”，所以人類皮膚顏色變化是因為色素。
2. 同樣是細節(jié)理解題，從文章第三段“Plants also have pigments. Colours are important for them to live on. The bright colours of flowers catch the attention of insects, which then carry their pollen(花粉) from one flower to another.”可知，植物用顏色吸引昆蟲。
3. 詞義猜測題，根據(jù)第四段“Animals also use colours for their own need. They protect themselves with different colours so that they will not be seen by predators easily.”以及后面舉例說明動物用顏色保護自己不被捕食者輕易發(fā)現(xiàn)，可推測“predators”是捕食其他動物作為食物的動物。
4. 文章結(jié)構(gòu)題，文章第一段總述自然界色彩豐富，人類、植物和動物呈現(xiàn)不同顏色；第二段講人類皮膚顏色變化原因；第三段講植物顏色的作用；第四段講動物顏色的用途；第五段總結(jié)自然界中顏色的多種原因和用途，所以是總 - 分 - 總結(jié)構(gòu)。
