1·Who invented the question mark?
谁发明了问号?
—— 《柯林斯英汉双解大词典》
2·Also, when writing the question, we place a question mark at the end of it.
同时,当我们把问题写下来时,我们要在句子末尾加上问号。
3·To me it looks like a question mark.
对我来说它就像一个问号。
4·Everything is a question mark; nothing is a full stop.
一切都是一个问号;没有什么是一个句号。
5·Every sentence ends with a full stop or question mark.
每一个句子都以句号或问号结尾。