1 . World Consumer Rights Day is celebrated ________________ (annual) by consumer organizations worldwide. （所给词的适当形式填空）

2 . The school sports meeting is held ___________ (annual). （所给词的适当形式填空）

3 . The hotel, which is carved entirely from ice, is rebuilt ________ (annual). (用所给词的适当形式填空)

4 . No wonder Hangzhou is expanding________(annual) by 500, 000 to 600, 000 people. (所给词的适当形式填空)

5 . And do I do so weekly, monthly or ____________ (annual)? (所给词的适当形式填空)

6 . They celebrate their wedding anniversary ________ (annual). (所给词的适当形式填空)

7 . Cars should be tested ________ (annual) to be kept in good condition, otherwise they would be an invitation to accidents. (所给词的适当形式填空)

8 . The exhibition is held ________ (annual). （用所给词的适当形式填空）

9 . Beijing’s new international airport put into use in 2019 serves 72 million passengers   ___________(annual).(所给词的适当形式填空)

10 . According to the WHO,2.4 million people died________(annual) from causes directly related to air pollution. (所给词的适当形式填空)