✔ 最佳答案
奇怪,他怎麼還沒到?
(我因為不明白原因,所以才"覺得奇怪"。wonder=驚訝)
If you wonder about something, you think about it, either because it interests you and you want to know more about it, or because you are worried or suspicious about it.
p.1801 Collins Cobuild English Dictionary for Advanced Learners
I wonder why he hasn't come.這句所表達的情緒應是「擔心」(worried)。