1 . The industry has grown 27% _______(annual) over the past 10 years. （所给词的适当形式填空）

2 . There are three books I reread________(annual). (所给词的适当形式填空)

3 . For the Armstrongs, traveling abroad costs an arm and a leg ________ (annual).   (所给词的适当形式填空)

4 . If both sides agree, the contract can be renewed ________ (annual)．（所给词的适当形式填空）

5 . 2. 4 million people died________(annual) from causes directly related to air pollution. （所给词的适当形式填空）

6 . Consumers spend billions of dollars ________(annual) on activities and products related to their fitness. (所给词的适当形式填空)

7 . Varieties of ceremonies have been held ____ (annual) to memorize the founding of New China. (所给词的适当形式填空)