问题：
[单选题] There are four questions,which is not from the discourse teaching?
A、What does the author imply?
B、Should we say“a apple”or“an apple”?
C、What can be inferred from the text?
D、What's the writer's main opinion?
参考答案：
B、Should we say“a apple”or“an apple”?
● 参考解析
