You must check ( )at the airport an hour before your flight takes off.
举一反三
- You must_________at the airport an hour before your plane leaves. A: check in B: check out C: check with D: check over
- Passengers must _____________ at the airport an hour before the train leaves. A: check out B: check in C: checking D: check over
- To show your ticket and get your seat at the airport is to _________. A: check out B: check off C: check in D: check on
- Before the flight takes off, all the passengers are asked to (fast) ______ their seat belts.
- If you ___________ for your flight, you need to cancel checkin to be able to change your flight.