一、选出每组单词中画线部分发音不同的一个单词
()1. A. bird B. girl C. doctor
()2. A. nurse B. teacher C. hurt
()3. A. worker B. purple C. burger
()4. A. tiger B. skirt C. shirt
()5. A. sister B. first C. third
()6. A. term B. mother C. father
()7. A. her B. ruler C. eraser
()8. A. birth B. brother C. dirt
()9. A. computer B. nurse C. dinner
()10. A. sir B. girl C. under

1. C
2. B
3. A
4. A
5. A
6. A
7. A
8. B
9. B
10. C

二、用所给单词的适当形式填空
1. Animals (be) our good friends in nature.
2. Dogs can (help) blind people walk safely.
3. A guide dog is usually (train) carefully when it is young.
4. Many animals help us (keep) the balance of nature.
5. We should learn (understand) animals better.
6. Horses (carry) heavy things for people in the past.
7. It's necessary for us (protect) all living things.
8. Some birds help farmers by (eat) harmful insects.
9. Animals give us so much, so we must stop (hurt) them.
10. The (friend) between humans and animals is very valuable.

1. are 2. help 3. trained 4. (to) keep 5. to understand 6. carried 7. to protect 8. eating 9. hurting 10. friendship

三、从方框中选出可以填入空白处的最佳选项。有一项为多余选项
Dinosaurs(恐龙) were amazing animals that once ruled the Earth for about 160 million years. They lived in the Mesozoic Era and disappeared about 65 million years ago. 1.
Scientists learn about dinosaurs mainly through fossils(化石). These fossils include bones, eggs and even footprints left by dinosaurs. 2. For example, some dinosaurs were as small as chickens, while others were as big as ten elephants.
Not all dinosaurs were the same. Some were plant-eaters, feeding on leaves and grass. 3. They had sharp teeth to catch other animals for food. Besides, some dinosaurs had feathers, which made scientists believe that birds might be their descendants.
4. In the 19th century, scientists first noticed the similarities between dinosaur and bird bones. Later, fossils with feather marks found in Liaoxi, China, provided strong evidence(证据) for this idea.
Although dinosaurs died out long ago, they still attract people of all ages. 5. It helps us understand how life on Earth has changed over time.

1. F 2. C 3. B 4. E 5. A