This is my favorite photograph.

I felt displeasure at his attitude.

Where is the end mark of this sentence?

He was sleeping deeply like being fast asleep.

Chenla was once a Southeast Asian nation.

Let's analyze the formant of this audio signal.

His talk was so unclear that I couldn't understand what he was saying at all.

He is conducting missionary activities in Africa.

He is working to propagate Christianity in Africa.

His teeth are uneven, and it stands out every time he laughs.