____ have already sent ____ to ____ the surface of Mars, and ____ experiments to see if they can ____ any signs of life. So far, they haven't found any, but an ____ of rocks from Mars has ____ that they were created by the presence of water and wind. ____ life could have existed in the past.

Mars exploration

طباعة
تضمين

لوحة الصدارة

النمط البصري

الخيارات

تبديل القالب

استعادة الحفظ التلقائي: ؟