题目

完形填空I’m  ____1_____ English. My name ____2_____ Lily. I’m a new student. I’m twelve. Now I’m in Class Three, ___3_____, No.5 Middle School. My teacher is Miss Green. I have a sister. ___4____ name is Lucy. We are twins. We ____5_____ the same. She is___6___ a different（不同的） school.I’m ____7____ duty(值日) this morning. I can’t look after my sister. At school I help my teacher put(放) her book, map and pictures on her ___8_____. I tell my teacher everyone is here. But I’m ___9_____. Jim is not at school. I don’t ____10______ where he is. I think he is at ho如图所示，要在离地面5m处引拉线固定电线杆，使拉线和地面成60°角，若考虑既要符合设计要求，又要节省材料，则在库存的l1=5.2m、l2=6.2m、l3=7.8m、l4=10m四种备用拉线材料中，拉线AC最好选用（ ）A．l1B．l2C．l3D．l4