北大绿卡九年级英语全册 Unit 8 It must belong to Carla（第1课时）Section A（1a2d）课堂练习（含解析）（新版）人教新目标版

It must belong to Carla（总分25分，时间30分钟）一、单项选择题(10分)1．He failed the exam ________ he was too careless.