「1」Hello. It’s one of the first words we learn as babies, yet it’s one of the last ones we think to use as adults. That’s unfortunate, because saying hello is more than just saying hello--- it is recognition of another’s worth. How might the world change – how might we change--- if we mastered this word? To find out, I spent one month saying hello to every person I met. Here’s what I’ve learned.

Which sentence in the text is the closest in meaning to the following one?

Fill in the blank in Paragraph 5 with proper words. (within 5 words)

List three effects of smiling on health according to the text. (within 8 words)

Translate the underlined sentence in Paragraph 3 Chinese.

假设你是李华，曾在美国学习半年，现已回国。你想联系你的美国老师Mr. Smith,但没有其联系方式。请根据以下要点给你的美国同学Tom 写一封信：