题目

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. ___—Is it snowing? ( )—No, it __________.A.isB.isn’tC.doesn’t