3 . 在太空遨游一周后，载人飞船安全着陆，在那一刻，原本寂静无声的发射中心一片欢腾。(The instant) (汉译英)

4 . Complete the sentences with the correct forms of the words in the box.

send        survive       prevent       reach       breathe       step       land       sleep       use       help

1. After having succeeded in __________satellites into space, people wanted to know if it was safe for a human to go into space. On 3 November 1957, a dog named Laika became the first living thing __________space. She was also the first one to die there.
2. The USSR and the US both wanted to be the first to send a person to the moon. Later, the US succeeded, and Neil Armstrong became the first man __________onto the moon. During the first moon landing, astronauts had no vehicles__________, so they had to explore the moon on foot. On the fourth mission __________on the moon, astronauts took a lunar vehicle so that they could explore places further away.
3. Astronauts must wear spacesuits when they work in space because there is no air __________and it can be very cold outside the spacecraft. While__________, they must attach themselves to something so as__________ floating around.
4. The accident on the Apollo 13 spacecraft resulted in a loss of oxygen, water, and electrical power. The astronauts on board had to fight__________. At the same time, Houston's Mission Control worked hard __________the astronauts return to Earth safely.

5 . 关于中国太空项目的最新消息在长征号火箭着陆地球的前一天透露给了媒体。(land，leak) （汉译英）

6 . 只有三分之一的土地可以耕种。
Only ________can be farmed.

8 . No one knows who will be the first ________ on Mars.

A．landing

B．to land

C．landed

D．lands

10 . A number of the satellites record data on land and weather patterns. (英译汉)