题目

阅读理解。 Bob's father works in a restaurant. Last Friday Bob didn't have to go to school，so he went to work with his father. They had to get the food prepared before 11：30 a．m. Bob filled a large pot with water. His father washed and cut carrots，potatoes and tomatoes. His father cut some beef，too. Then someone came to the back door.It was Mr.Hunt，an old man living nearby.He asked Bob's father to give him some bones(骨头)．He needed some bones to feed his dog.Bob's father agreed and asked him to come later.Mr.Hunt thanked him and left. Bob's father added all the ve计算：3-27+|3-7|×34÷115-20110．