1 . People who engage in ________ (threat) behaviour should expect to be arrested. (所给词的适当形式填空)

2 . You should exercise more so as to keep __________ (energy) and you can work efficiently. (所给词的适当形式填空)

3 . The building looked as _________ (impress) in actuality as it did in photographs. (所给词的适当形式填空)

4 . After hundreds of failed experiments, they eventually came across a ________ (大有希望的) chemical. (根据汉语提示单词拼写)

5 . If it’s a legal matter you need to seek________ advice. (用适当的词填空)

6 . The boss is looking for someone who is ___________ (rely) and hard-working. (所给词的适当形式填空)

7 . ________ (judge) from his face on which there was a________ (confidence) smile, we knew that he didn’t lose heart. （用所给词的适当形式填空）

8 . Mr White is a careful and ________(experience) engineer, so he is often ________ (appoint) to finish some ________ (challenge) tasks.（用所给词的适当形式填空）

9 . You ___________________ with the camera. It costs!  
你一定要小心这台照相机。它很贵!