Have you e  1  planted a few trees on Tree Planting Day?

Each year, many of people, both old a  2 __ young, plant a lot of trees. But this may not be the best w 3  __to make your home a greener place. Last week, we v 4 __ a park in Hebei. We were s 5  __ to find most of the trees had been burnt. The workers told us that the trees d 6  _ soon after they were planted because they were not watered well enough. So the workers burnt them and changed the trees for new trees to be planted this year. On a card found in one of the trees, a student w 7 _ . “I hope this tree will g 8____up with me to become the backbone(栋梁) of our country.” The workers said that the survival of the trees was really more important t 9__ how many trees were planted.

Some people in Beijing now have a new idea that they can donate some m 10  and let professionals plant and take care of trees.

请从所给的四个选项中，选择最适合的一个填在问号处，使之呈现一定的规律性().

A.A

B.B

C.C

D.D