题目内容：

    Shark nets in place across Australia, specifically in New South Wales(NSW) and Queensland,to protect beachgoers should be dropped as they have caused more harm than good, a study has found.

The measures was carried out by some governments, including nets and traditional drum lines , and provided beachgoers with a false sense of safety. The study found the effectiveness if nets was difficult ti evaluate, while the significant damage they cause to other marine(海生的）wildlife was clear. Researches desire for non-deadly shark control measures such as eco barriers, sonar(声呐）technology , and various shark-spotting techniques.

Researchers said while the risk coming across a shark was rare, any shark-related deaths and injuries caught huge public and media attention.

One of the arguments in support of using shark nets is that just one shark-related death has been reported in Queensland since the 1960s. Similarly, since the 1930s, NSW has had only one shark-related death. But there have been at least 13 people killed by sharks at beaches without nets in the NSW north coast over the past two years.

The Human Society International’ head of campaigns, Nicola Beynon, said the government needed to move away from outdated methods.Deadly shark nets and drum lines are more than 50 years behind scientific and animal welfare standards for dealing with marine wildlife,” said Beynon.

The NSW Greens’ marine spokesman, Justin Field,said, People are 100 times more likely to drown at the beach than to be killed by a shark in Australia. Therefore, millions of dollars going into the shark net program should be directed to observation towers for our lifeguards and improving the beach devices.”

1.Which of the following do researchers focus on?

A. Beachgoers’ safety. B. The shark-related death rate.

C. Friendly shark control ways. D. Advanced shark-spotting techniques

2.What is paragraph 4 mainly about?

A. Shark-related deaths. B. Measures to protect sharks.

C. Reasons of using shark nets. D. Dangers for beachgoers

3.What do Nicola Beynon and Justin Field have in common?

A. Science os developing too fast B. Observation towers need rebuilding

C. Many people are drown every year. D. No shark nets are to be used.

4.What can be the best title for the next?

A. Are shark nets necessary? B. A new study on sea animals

C. Shark net programs D. Effective ways if avoiding sharks