1. (2021九上·二道开学考) 语法填空

Zephyr is an 8-year-old yellow dog. She walks in a school and even goes to class with students at school in Texas, US.

This school has a guide dog (train) program. It started two years ago. Zephyr

is one of the many dogs that the program trains to help the . In this program, students first work as dogsitters（保姆）that take of dogs. They receive training in Guide Dogs for the Blind, the (large) guide dog school in North America. They

help to look after the dogs for a while before getting a dog of their . Then they start to train the dogs in different environments. The student trainers will work with the dogs (most) for one year.

Izabella Harris joinedprogram about a year ago. Zephyr is her dog. One morning, she and some other students trained their dogs to walk across the street. Zephyr wasnot(allow) to eat food on the ground. When the school bell rang（铃响）, the dogs followed their trainers to the next classroom, sitting or lying quietly between their trainers'(foot).

“I hope Zephyr will the eyes for someone one day,” Harris said.