双基限时练(十六) module 4 section ⅳ 基 础 夯 实 ⅰ.完成句子 1．we ________ ________ ________ ________ ________ (一直在打扫教室) all the morning. 答案 have been cleaning the classroom 2．________ ________ ________ ________ (我受不了了); i will quit. 答案 i can't stand it 3．wherever there is ________ ________ ________ ________
