Do you remember what you were doing?中的宾语从句和时间状语

问题描述:

Do you remember what you were doing?中的宾语从句和时间状语
People often remember what they were doing when they heard the news of important events in history.In the United States,for example,many people remember what they were doing on April 4,1968.This was one of the most important events in modern ................................................

有两个句子呢.
宾语从句都是what they were doing.
第一个句子的时间状语从句是when they heard the news of important events in history,第二个时间状语是on April 4,1968.