Gap Fill - Level 1


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NASA want to get humans to Mars. Researchers are trying to find out plants can grow on Mars. They hope astronauts will grow their food on the Red Planet. Getting to Mars could take -and-a-half years. The astronauts will need a of food for the . They can come back to Earth. This means they will need to grow their own food from . This could be a problem Mars doesn't have good soil. It just has dust.

Humans could be on Mars in the 15 years. NASA has been testing "Martian " using a soil made of dust. It has no or organic , so it is similar to Mars dust. The scientists grew lettuce in it and it tasted . The lettuce had weaker and took to grow. NASA said testing 'Martian gardens' on Earth help to develop ways of growing food on Mars in the .

Try the Level 2 gap fill.

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