Trees provide cool shade and clean air for people     1    (breathe). But would you ever write a letter to a tree? Officials in Melbourne, Australia have discovered that for many the answer is a loud yes. When they carried out a program     2     gave each tree an email address in order to help people identify damage, they     3     (discover) that people preferred to write them love letters instead.

The city is calling it     4     unintended but positive result of their attempt to help people track tree damage. On their urban forest data site, Melbourne assigned (分配) ID numbers and email addresses to each of the city's trees so that it would be     5    (easy) to catch and recover damaged trees than before. Then the emails began to arrive. Instead of some     6    (report) on damage, people began to write fan mail to trees. The writers praised their looks and inner     7    (beautiful). Some told tales of     8     they had helped them survive during bad weather. Some trees even wrote back.

The effort is part of a larger plan. That is to protect Melbourne's 70,000 city-owned trees from reduction and drought. But     9     turns out that Melbournians have always been tree enthusiasts. The government notes that in the 1880s, people wrote asking for     10    (plant) trees to take in bad gases from a nearby factory.

Sea turtles have been swimming in the world’s warm waters for millions of years.

Male sea turtles stay in the water, while females come out at night    1    (lay) eggs in the sand. These babysea turtles dig out of their nests at night and go back to the water. They swim to deeper water,    2    is safer, but their journey is tough and they will face many    3    (nature) dangers. Crabs, birds, lizards, fish, and foxes all try to eat the baby turtles. Most baby turtles don’t survive to become adults.To make matters worse, people pose (造成) many    4    (threat) to sea turtles.

When we pollute the water    5    trash or chemicals, the water becomes less safe to the animals that live there. Eating plastic bags can make sea turtles choke and die. Chemical    6    (pollute) may also lead to diseases in them.

Catching fish for food is a big business. The problem happens when fishermen    7    (accident) catch other animals like sea turtles. Sea turtles can    8    (kill) by nets and other fishing tools.

After all these years,    9    number of sea turtles in the world is getting smaller. They are endangered, which means they’re in danger of    10    (disappear) forever. Take action to protect sea turtles now!