In the following passage, some words have been deleted. Select the most appropriate option to fill in each blank.
All of us know that the American astronaut Neil Armstrong was the first (1) _____ to set foot on the Moon in July 1969. Human footprints on the lunar (2) ______ won’t disappear for millions of years. That is because there is no rain or wind to (3) ______ them. The surface area of the Moon is 25% larger than that of Africa. Astronauts have so far brought back hundreds of kilos of rock and dust from the Moon to (4) ______. It takes the Moon 27.3 days to travel around the Earth. As it does so, we see different amounts of its side (5) ______ by the Sun. That is why it appears to get larger and then smaller.
Select the most appropriate option to fill in blank number 1.