阅读下文，为各空选择合适的词，排出所选词的顺序 Dear Sir or Madam, I am writing (1) for your hotel’s considerate service when I held my grandfather’s 90th birthday party. All of the guests were (2) the party. As they stepped into the hotel, (3) was given by waitresses and waiters. The dishes were pretty delicious, and suited everyone’s taste. Besides, the staff (4) the elderly guests. More importantly, many interesting activities were arranged after dinner, making everyone joyful. It is (5) that leads to the success of the party. Words fail to express my gratitude. Yours faithfully, David a) were friendly to b) to express my heartfelt gratitude c) your perfect service and excellent efforts d) really impressed by e) a warm welcome