You can often see them holding a cup of tea and there werewith too many tea leaves in their cup. You can often see them holding a cup of tea with too many tea leaves.

It sounds slightly better this way, but I am not quite sure what you mean about too many tea leaves.

I am Chinese and I don't have'm not in the habit of drinking coffee. I am Chinese and I'm not in the habit of drinking coffee.

It seems like I have drunk it for a long while, but later, after I drink it, I feelget a little headache and can't fall asleep. It seems like I have drunk it for a long while, but later, after I drink it, I get a little headache and can't fall asleep.

I'm not sure what you mean by 'It seems I have drunk it for a long while'

The feeling doesn't happen justI've had this feeling more than once, so I haven't drunkhad coffee for a long time. I've had this feeling more than once, so I haven't had coffee for a long time.

Usually I don't have'm not in the habit of drinking water unless I feel thirsty. Usually I'm not in the habit of drinking water unless I feel thirsty.

When I am thirsty, I prefer drinking cold boiled water because I believe cold boiled water is the bhealthiest drink for our health. When I am thirsty, I prefer drinking cold boiled water because I believe cold boiled water is the healthiest drink.

Although I know drinking more water is good for one's health, I am still don't havenot in the habit. Although I know drinking more water is good for one's health, I am still not in the habit.

Maybe each person is in ahas different situation and they are not suitable for the same rul same rule doesn't apply to everyone. Maybe each person has different situation and the same rule doesn't apply to everyone.