1 . But in cities, limited space has led to people _________ (look) for new solutions. （所给词的适当形式填空）

2 . Many people are suffering _____(economy) hardship. (所给词的适当形式填空)

3 . Much to their delight, their new project __________ (approve) at the conference, the excited scholars decided to hays a barbecue to celebrate the fantastic moment. (所给词的适当形式填空)

4 . In addition, the more you work out, the___________(energy) you will become. (所给词的适当形式填空)

5 . Most information was collected by direct ________(observe) of the animals’ behaviour. (用所给词的适当形式填空)

6 . He spent much of his life ________ (探索) the wildlife. （根据汉语提示单词拼写）

7 . I wonder if you can give me a ________(describe) of the celebration. （所给词的适当形式填空）

8 . _________ (step) into the campus, I felt extremely delighted. (所给词的适当形式填空)

9 . If the weather’s fine, we’ll go________(hike)this weekend. (所给词的适当形式填空)

10 . The late flood did much damage ____________ the village. (所给词的适当形式填空)