2．The author noticed the teacher's characteristics when ________.

　　A．she stood on the playground

　　B．she was at the open house

　　C．she said goodbye to the teacher

　　D．she worked as a teacher at lunch time

　　B　解析：细节理解题。根据第二段首句"We first met you at the open house the week before school started and I immediately knew you would be the type of teacher we would appreciate forever．"可知，在开学前一周的校园开放参观日当天，作者就看出了孩子的老师将会是自己永远感激的人。

　　3．What does the underlined word "veteran" in Paragraph 3 mean?

　　A．Beautiful． B．Generous.

　　C．Skillful. D．Humorous.

　　C 解析：词义猜测题。根据第三段的内容可知，老师关注孩子们的大小事，并且深知幼儿园无小事。由此可推知，这是一位经验丰富的幼儿教师，故画线词与C项"熟练的"词义相近。A项意为"美丽的"，B项意为"慷慨的"，D项意为"幽默的"，均与语境不符。

　　4．What is this text mainly about?

　　A．Good wishes to a kindergarten teacher.

　　B．Sincere thanks to a kindergarten teacher.

　　C．A sweet memory of kindergarten life.

　　D．A kid's daily behavior in the kindergarten.

　　B　解析：主旨大意题。通读全文可知，本文是一位幼儿妈妈表达对幼儿园老师的感激之情，故选B项。A项"对幼儿园老师的美好祝愿"，C项"幼儿园生活的美好回忆"，D项"一个孩子在幼儿园的日常行为"，均与文意不符。

　　B

　　(2019·济南5月针对性练习)Many people traveled to Las Vegas, Nevada during January 5th to 8th, 2017 for the 50th Consumer Electronics Show, or CES. The show is said to have the largest collection of new electronic devices in the world.

The show had many examples of "smart home" devices. "Smart home" technology is designed to make life easier for people by letting computers control many things inside their homes. One such device actually begins working outside the home, when someone arrives and