It’s true that everyone loves a mystery, ________ when it mixes history with fiction. That’s why “The Da Vinci Code”(《达芬奇密码》) is so popular.

A.especially              B.equally                     C.totally                      D.finally

阅读下列短文，从每题所给的四个选项中选出最佳选项。

　　Until men invented ways of staying underwater for more than a few minutes，the wonders of the world below the sea were almost unknown．And to make full use of the rich natural resources（资源）underwater was quite impossible．How could air be supplied to divers below the surface（表面）of the sea？There were pictures in the past showing men swimming under the surface with air bags tied to their bodies．A pipe from the bag carried air into the swimmer's mouth．But little progress was made in the invention of diving devices（潜水设备）until 1490，when the famous Italian painter Leonardo da Vinci（莱昂纳多·达芬奇）designed a complete diving suit．

　　In 1819 a German，called Siebe developed a way of forcing air into the head covering by a machine operated above the water．Finally，in 1837 he invented the“hard-hat suit” which was used for almost a century．It had a metal covering for the head and an air pipe attached（连接）to a machine above the water．It also had small openings to remove unwanted air．But there were two dangers to the hard-hat suit．One was a sudden rise to the surface，caused by too great a supply of air．The other was the crushing（挤压）of the body，caused by a sudden dive into deep water．

1．The passage is mainly about ________．

[　　]

A．how to invent diving devices

B．how to develop a way of diving

C．how to design a diving suit

D．the development of diving devices

2．It was dangerous for the diver in a hard-hat suit if ________．

[　　]

A．the air pipe was long

B．the openings removed unwanted air

C．he dived into deep water

D．the machine suddenly supplied too much air

3．Why did people try to invent good equipment for diving？

[　　]

A．To make better use of the natural resources under water

B．To visit the sea world

C．To catch more fish

D．To paint better pictures．