Forest guards in western India are using cell phones with ringtones（手机铃声）of cows mooing, goats bleating and roosters crowing to attract leopards （豹）that have wandered into human settlements, officials said on Monday.
The wild cats in the state of Gujarat often get into villages near forests in search of food, say officials, adding that this results in attacks on people. But rather than use methods such as live bait（活诱饵）like goats tied to trees to lure (引诱) the leopards, which then fall into large pits dug by guards, officials say they have found a safer method to trap the cats.
“The moos of a cow, and bleating of a goat from the phone have proved effective to trap leopards,” said D. Vasani, a senior forest official in Gujarat. “This trick works.” Vasani said forest guards have downloaded the sounds of over a dozen animals as ringtones on their mobiles which they attach to speakers and fix behind a cage. They then play the ringtone continuously for up to two hours until the curious leopard appears and moves into the cage looking for its easy meal.
At least five leopards have so far been lured from villages since the new ringtone method was introduced three months ago. The cats have all been released （释放）back into forest areas.
Wildlife activists welcomed the new initiative (新方案) saying that previous methods of trapping the cats using pits often resulted in the animals getting injured.
What can be the best title of the passage?

A．Cell Phones to Hunt Animals	B．Practical Uses of Cell Phones
C．Wildlife And New Technology	D．Phone Ringtones to Catch Leopards

Forest guards in India try to catch leopards mainly because _______.

A．leopards attack villagers	B．they want leopard fur
C．leopards attack animals	D．they have new ringtones

According to the wildlife activists, the new method is _______.

A．appreciated because it benefits leopards	B．not good because it may injure animals
C．effective because ringtones work	D．not safer than the former one

We can learn from the passage except that _______.

A．forest guards don’t mean to hurt the leopards

B．forest guards no longer use pits to trap leopards

C．forest guards used goats to attract leopards

D．recorded animal sound are used to lure leopards

What will be needed to trap the leopards using the new method?
a. cell phones  b. animals  c. sounds of animals  d. cages  e. large pits

A．abcd

B．bce

C．ade

D．acd