1. (2023八下·义乌月考) 阅读下面短文，从每题所给的A、B、C、D四个选项中选出最佳选项。

A common weed (野草) growing around Australia could help send humans to Mars, thanks to the work of South Australian scientists.

Duckweed is a bright green water plant that grows quickly and is rich in nutrients. And it might be the key to producing food for astronauts going on long journeys in space.

Jenny Mortimer works on the duckweed project at the University of Adelaide. She said it was almost impossible to take enough food on a long space journey, such as the one to get to Mars and back.

A trip to Mars with a team of four astronauts will need about 10,000 kilos of food. "You can't take that with you because you don't have enough room and each kilo you take with you to space costs around $20,000," said Mortimer.

"The International Space Station is amazing, but it's only 400 kilometres above the earth, too far to reach from Mars."

Scientists think of flying things to Mars before astronauts are sent up there. The problem is that the food would have to be able to last for long. And it can be really boring if you have to eat the same things day after day.

"Astronauts can go through something called menu fatigue. Even though their food is healthy, they'll lose weight because they just stop eating."

Mortimer believes that duckweed can grow on spaceships and even underground on Mars, using LED lighting. Next, food scientists will work out ways to make duckweed more delicious. "Maybe they can make something that tastes like cheese or yoghurt, but that's a research project for the next five to seven years," she said.

1. （1） Why might duckweed be the key to producing space food?

   A . It grows slowly. B . It grows in water. C . It is rich in nutrients. D . It is delicious to eat.
3. （2） It's impossible for astronauts to take enough food to Mars mainly because______.

   A . there is not enough space B . space food is too expensive C . there is no space station to help D . the food can't last for a long time
5. （3） If an astronaut had menu fatigue, he (she) would ________.

   A . feel tired B . get angry C . become thirsty D . stay hungry
7. （4） Which could be the best title for the passage?

   A . Duckweed could Help Astronauts Lose Weight B . Duckweed could Feed Future Astronauts C . How to make Duckweed Taste Better? D . How to Grow Duckweed in Space?