题目内容：

Horses are certainly a marvel (奇异的事物) of creation. They are extremely strong and interact (互动) with their environment through their senses. Compared to us, they see better, hear better, have a better sense of smell, and can feel the smallest insect on their bodies. They have survived by using their senses to get away from danger for centuries.

Hearing

Riding animals have excellent hearing, better than that of humans. Horses’ ears rotate (转动) 180 degrees and generally face the direction the animal is looking. They can focus one eye and ear on the rider and one eye and ear on something else. When they hear something, horses want to see the cause. Noise created by traffic, wind, and other distractions (分心的事物) can greatly affect their hearing, and cause horses to become skittish. Riding animals in more complex environments become used to disturbing noises after repeated exposure to (暴露于) them. Vehicles backfiring, gunfire, helicopters, trains and mechanical equipment can be tolerated by riding animals that are accustomed to (习惯于) them. Horses that spend time in rural areas get used to noises there, such as the sounds of farm animals or forest activities. However, all these sounds and many others can startle (使惊吓) riding animals unfamiliar with them, making it difficult for riders to keep control.

Smell

Horses have an excellent sense of smell, much better than that of humans. They may use smell to find their way back. They readily smell other animals, and they can tell differences in the smell of water. Most horses are happy to drink muddy water from a puddle (水坑) because it has a natural smell, but they may refuse to drink from an unfamiliar source. Many riders travel with an old water bucket so their horses will welcome water in the campground.

Touch

Horses are so sensitive to touch that they can feel a fly land on a single hair. Slight pressure from a rider’s legs can guide a horse forward and anything touching its body hair can alert (使警觉) the animal to trouble. If a horse brushes up against a narrow passage and feels trapped, its survival nature kicks in. Sharp objects easily cut or damage the relatively tender skin of a horse and painful or sharp impacts cause a horse to run away from the offending object, potentially injuring itself or others.

Curiosity

Some horses are exceptionally daring. Their curiosity leads them to explore anything new in their environment. They smell, push, move, pick up, or play with new objects within their reach. They may pull things into a corral (畜栏) with their teeth or kneel to reach underneath fences for something they want. Depending on the design of the fence or barrier and the size of the animal, horses may be able to reach 6 feet beyond its edge.

1.The underlined word “skittish” in Paragraph 2 probably means “_____”.

A. frightened    B. puzzled

C. curious    D. calm

2.Riders are advised to travel with an old water bucket because _____.

A. their horses prefer to drink from a puddle

B. there isn’t enough water in the campground

C. their horses need a familiar smell to find their way back

D. water with a familiar smell is welcomed by their horses

3.How will horses do when they are curious about something outside their fences?

A. They focus their eyes on the thing.

B. They use their feet to touch the thing.

C. They try their best to reach the thing.

D. They struggle to get out of their fences.

4.What’s the best title for the passage?

A. A brief introduction to horses’ senses

B. How horses use their hearing and smell

C. Why horses are called a marvel of creation

D. Comparison between horses’ senses and humans’