题目内容：

Neil Jordan, a conservation biologist, has come up with a novel method for protecting cattle from African lions: paint eyes on their behinds. The lions will think their intended prey has seen them and will give up, since they’ve lost the element of surprise.

This psychological trickery has been called “iCow”, which is actually not as strange as it sounds. The eye-like patterns on butterfly wings are known to prevent preying birds and woodcutters in Indian forests wear masks on the backs of their heads when working to discourage hungry tigers.

The inspiration for the iCow strategy came while Jordan was based in a village in Botswana, when two lionesses were killed by local farmers to revenge their cattle’s death. The African lion is a vulnerable species, with numbers dropping from over 100,000 in the 1990s to about 30,000 today. Much of that decline is due to these kinds of revengeful killings because farmers have no effective strategies for protecting their herds.

“Lions are hunters that like to attack by surprise. They move slowly, quietly and carefully to their prey, get close and jump on them unseen,” he said. When Jordan was watching a lion follow an antelope one day, he noticed the lion gave up the hunt once the antelope spotted it.

So he joined one of the local farmers on a 10-week trial study, painting eyes on one-third of a herd of 62 cattle. When the cattle returned each night, they took a head count to see how many had survived. Only three cows were killed by lions during this period-all without the painted eyes on their behinds. And all the painted cows survived. However, Jordan warned that so far this is just a promising idea. He is now back in Botswana for a more ambitious study, armed with GPS devices to better monitor the movement of predators and prey.

1.The iCow strategy is designed to       .

A. kill the lions    B. warn the preys of danger

C. identify the cattle    D. scare off animals that kill

2.When hunting, lions like to       .

A. give up halfway    B. hesitate to take action

C. chase their prey steadily    D. launch surprising attacks

3.What can be inferred from the passage?

A. The iCow strategy is likely to bring great benefit.

B. In the 10-week trial study more cattle were killed.

C. The farmers will take their revenge on more lions.

D. Neil got inspiration from patterns on butterfly wings.