1. (2024八下·温州开学考) 完形填空

If a friend does a big favour for us, it's a good idea to write them a thank-you 1 . But how many of us actually 2 to do this?

"People don't appear to walk around giving thanks to people quite 3 ." Amit Kumar from University of Texas said. Why aren't people sure or active about sending thank-you notes? And how do people 4 when they receive one?

Kumar and his team asked their 5  to write a thank-you note to another person by email. Then, they asked both the 6  and the receiver how sending or receiving these notes made them feel. 

They found that the students didn't like to write the notes 7 they felt like they had to think too much about them. They worried about 8 to say and how to say it.

The receivers, however, 9 the notes. "When you are a receiver, you pay more attention to the warmth of the note," Kumar says. "How moving was it? How friendly and 10 ?"

The writers also thought it 11 be awkward (尴尬的) for the receiver to get a thank-you note. But it was not what 12  imagined. 

"They (receivers) feel quite happy," Kumar says. "They don't really feel awkward at all."

"13 people knew that writing a thank-you note could have such a big impact (影响) on others, they would do it 14 often," Kumar says.

"Simple, small changes in our everyday lives can make a big 15 in how we treat other people and how we feel," he says.