询问太空信息的特殊疑问句 — 英语词汇题
题目
补全下列询问太空信息的特殊疑问句（每空填一个疑问词：What / Where / How / When / Who）。
1. —____ is the Moon from the Earth? —It's about 380,000 kilometres away.
2. —____ goes around the Earth? —The Moon does.
3. —____ do astronauts sleep in space? —They sleep in sleeping bags.
4. —____ did Yang Liwei go into space? —In 2003.