1 . When asked for his views about his teaching job, the teacher said he found it very fun and ______. (reward)(所给词的适当形式填空)

2 . Not only the activity was greatly praised but also it raised our environmental awareness. What a ________________ (reward) day! (所给词的适当形式填空)

3 . You will ________________ with a Chinese dictionary for your ________________ suggestions on how to strengthen my confidence.(reward) (所给词的适当形式填空)

4 . Cleaning the polluted river takes money and time but it is ________________ (reward) for future generations. （所给词的适当形式填空）

5 . Hence, the ________________ activity will________________ us with many benefits.(reward) (所给词的适当形式填空)

6 . Learning about the requirements of each plant can be very ________(reward). (所给词的适当形式填空)

7 . According to a professional running athlete, finishing a long run is a very ______(reward) experience. （所给词的适当形式填空）

8 . Travelling along the old Silk Road is an experience, which is ___________________ (reward). (所给词的适当形式填空)

9 . I volunteered to work in a large factory last winter, which was a ________ (reward) experience. (所给词的适当形式填空)

10 . Yoga is often tiring but ________ (reward), because nothing beats the feeling you get after finishing a set of movements. (所给词的适当形式填空)