Xiaoming is used to send a lot of cards to his friends 1. ________
at new year time. And all his classmates did same. But 2. ________
on one day he read a report in the newspaper, which said 3. ________
that cards are made of trees. A large number of cards would 4. ________
consume a lot of trees but at present more and more trees have 5. ________
been cut down lead to serious floods in some areas. Xiaoming 6. ________
felt shocked at the report in the newspaper and realized the 7. ________
important of protecting trees, and then he shared this report 8. ________
with their classmates. From now on he decides to send his 9. ________
wishes to his friends by telephone instead sending cards. 10. ________