---What is our earth like ________from the moon? ---Well, our earth, with water ________ 70% of its surface, appears as a "blue ball". 

(2013·厦门一模)________ as a responsible person, Tony was appointed head of the department.

________ to sunlight for too much time will do harm to one's skin.

.____exercise early in the morning has become part of his retired life .

Once ____________ ,  a plan should be carried out.