When you make travel plans, you’d better _______that every flight can be late.
举一反三
- When you make travel plans,
- When you read the book, you’d better make a mark_____ you have any questions.
- What can you prepare in advance when you are going to travel abroad?
- When you want to go abroad to travel, you can only choose travel agency to book a trip.
- Travel books are better than a or a,because you can always read them whenever you want