21.   It is considered that fresh water is not used up for ever.

22.   malaria is considered to have lower-priority.

23.   it is considered as low public health priority.

24.   What can do should be considered seriouly.

25.   Such a person was considered to have no worth, no importance, no value to the group.

26.   The Chinese diet contains a lot of fruit and green vegetable, it's considered to be the healthiest in the world.

27.   The Chinese diet is considered to be the healthiest in the world.

28.   Put it in other word, many of those who have not earned sufficient money are considered successful for their accomplishments.

29.   on one hand, it's considered that "never give up" is a positive attitude towards life and a key factor of a person's success.

30.   The Chinese diet is considered to be the healthies in the world.