阅读理解

    阅读下面材料，从每题所给的A、B、C、D四个选项中选出最佳选项。

The World with Its Countries

                         The world with its countries

                         Mountains and seas,

                         People and creatures(动物)

                          Flowers and trees,

                         The fish in the waters,

                         The birds in the air

                         Are calling to ask us

                         All to take care.

                         These are our treasures,

                         A gift from above,

                         We should say thank you

                         With a care that shows love

                         For the blue of the ocean,

                         The clearness of the  ▲  ,

                         The wonders of the forests

                         And the valleys(山谷) so fair.

                         The song of the sky bird,

                         The warmth of the sun,

The rushing of clear streams(溪流)

                                           And new life begun

                                           Are gifts we should cherish(珍惜)

                                           So join in the call

                                           To try to protect them

                                           For the future of all.