Here are the correct answers for each blank in the sentences you provided:
You need a passport to cross the border between Mexico and the United States.
Answer: C borderThe hotel where we are staying is quite luxurious.
Answer: D stayingWhen you arrive at your destination, your tour guide will meet you at the airport.
Answer: A arriveIt can be quite busy here during the tourist season.
Answer: A seasonDavid takes me to the train station every morning.
Answer: B takes
If you have more questions or need help with another topic, feel free to ask!
