题干
While my mother was cooking, my father was newspaper.
A：read
B：to read
C：reading
D：reads
答案(点此获取答案解析）
C
While my mother was cooking, my father was newspaper.
A：read
B：to read
C：reading
D：reads
”、“ 
”分别表示不同元素的原子。下列对图示模型理解正确的是（ ）