题干
----- Where was I ?
------ You _________you didn’t like your father’s job.
A：had said
B：said
C：were saying
D：had been saying
答案(点此获取答案解析）
C
A：had said
B：said
C：were saying
D：had been saying
”“ 
”分别表示氢、氯、氧三种不同元素的原子，其中表示单质的是（ ）