单选题 Scientific research results can now be quickly ____ to factory production.

单选题 Cancellation of the flight ____ many passengers to spend the night at the airport.

单选题 I called the airline to ____ my flight reservation a week before I left for Canada.

单选题 ____ aeroplanes in this company are Boeing planes.

单选题 You have to ____ an hour befoe departure.

单选题 The airline has a booklet ____ will tell you most of the important information to Europe.

单选题 Before 1992, there was no airline ____ the two cities.

单选题 Our flight to Guangzhou was ____ by a bad fog and we had to stay much longer in the hotel than we had expected.

单选题 Henry ____ a flight reservation by telephone.