中国大学MOOC: _______ is not the necessary travel document when you go abroad by air.
举一反三
- 中国大学MOOC: _______ is not the necessary travel document when you go abroad.
- 中国大学MOOC: If you go abroad, you need your ________ as one of your travel documents.
- When you want to go abroad to travel, you can only choose travel agency to book a trip.
- 中国大学MOOC: When you travel abroad, set your watch immediately to agree with local time at your _________.
- When you travel abroad, you need a(an) ___.