1. (2020高三上·哈尔滨月考) 阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。

Kindness can really make you pause and be thankful during a stressful time.

Cassandra Warren was in a1and was feeling a little overwhelmed (使应接不暇) by work and planning her wedding. After she got her wedding invitations ready one day, she hurriedly 2one to her aunt and uncle. A week later, the invitation came back. She had written down the 3address. A handwritten note was4the returned envelop, which read, "I wish I5you—this is going to be an enjoyable experience. Congratulations—I've been married for 40 years—It gets better with age. Go to have dinner6 the money." A $20 bill was inside.

Cassandra was at a bit of a professional crossroads and had been having a 7  day. In fact, she'd nearly broken down, telling her8 to her husband-to-be Jesse Jones just as she opened the 9 envelop. Then she read the note. "It was kind of perfect timing," said Cassandra Warren. "We    are10 who the mysterious note writer is. But I really11 it"

Cassandra and Jesse12 with a friend who was going overseas the following night. They happily put the $20 towards their13. Then Cassandra stopped by a store and bought a thank-you card. She 14  wrote her aunt's address on the envelop again—this time 15 —and addressed it to "Kind Stranger" 16 by the following words inside, "Thank you for the17and taking 18 to send it. Not so many people would have done that. It was a big 19 after the day I was having. I am20 people like you still being in the world."