问答题 to is used after some adjectives: pleased glad surprised disappointed relieved to ______ I was pleased to receive your invitation. They were relieved to hear the plane had landed safely. I was glad ______ my old colleague at the conference. We were surprised ______ that the fare was over $500. interesting kind hard essential difficult easy to ______ It was interesting to see the factory. It's hard to get a visa for Myanmar. It's easy ______ from the airport to the city by public transport. It was very kind of you ______ me at the station.