1. “Every weekend, the astronauts can have private video conferences with their families on the Earth,” Dr. Nelson said.

→ Dr. Nelson said every week , the astronauts could have private video-conferences with their families on the Earth.

2. “Have the astronauts ever forgotten anything from the Earth?” Nick asked his teacher.

→ Nick asked his teacher if the astronauts had ever forgotten anything from the Earth.

3. “The astronauts on the ISS use a 3-D printer on board to print certain objects,” the teacher answered Nick.

→ The teacher told Nick the astronauts on the ISS used a 3-D printer on board to print certain objects

4. “Where can we look for life?” Nga asked Dr. Nelson.

→ Nga asked Dr. Nelson where they could look for life

5. “Ganymede, the largest moon of Jupiter, has a large saltwater ocean,” the teacher said.

→ The teacher said that Ganymede, the largest moon of Jupiter, had a large saltwater ocean