綜合測驗
      Have you ever paid attention to the trees in your neighborhood? Most people do
not notice the trees around them, let alone appreciate what the trees are doing for them.
Nowadays, our streets and parks are lined with trees that    (11)      a peaceful and
pleasant environment. Trees provide us with shade from sun, and their trunks absorb
sound from noisy roads. They also provide food and homes for birds, insects, and other
animals. Our quality of life is    (12)    by the natural elements and wildlife habitats
that trees bring into urban settings.
      Trees contribute to the environment by giving out oxygen and taking in carbon
dioxide. They improve air quality and help keep the climate    (13)    . Leaves filter
sunlight and keep things cool in summer. Additionally, trees preserve warmth by
providing a screen from harsh wind and they protect us from heavy rainfall. Trees also
lower the air temperature and    (14)     the heat intensity of the greenhouse effect.
      Trees are beneficial to animals. Animals such as elephants, koalas, and monkeys,
eat leaves, flowers, and fruit for food. This process,    (15)    , helps spread seeds over
a wide area. Also, hundreds of living creatures call trees their home. Branches covered
with leaves are safe places for birds and squirrels to stay out of the reach of predators.
【題組】11.
(A) creating
(B) creates
(C) to create
(D) create