【正文】
omplete the following sentences. 1. 人們常常記得當他們聽到歷史上的重大事件時他們在干什么。 People often remember _____ they_____ _____ _____ they heard the news of important events _____ _____. 2. 這是美國歷史上的重大事件。 We _____ _____ dinner in the kitchen _____ we heard the news on the radio. 4. 她記得當時 (自己 )正在距兩座塔樓不遠的辦公室工作。 Even the date— September 11, 2021— _____ _____ _____ most Americans. 6. 霧正在漸漸消退。 When he _____ _____, his father _____ _____ him. 8. 不要打我的臉。 He got up late this morning, because his _____ _____ _____ _____. 10. 那時他正在等他爸爸。 doing B. were。 doing D. did。 making 6. heard 7. truth 8. meaning 9. were working 10. finishing Ⅲ . 1. what。 in history 2. an important event 3. were eating。 was watching 8. hit me in 9. alarm didn’ t go off 10. waiting for