根据句意和汉语注释，写出单词的正确形式。

1. One of the ______ (工程师) designs was thought to be the best.

2. Could you give me some advice about a way of ______ (获得) the balance between work and play?

3. Mrs. Gao is the ______ (严格的) teacher I have ever met in my life.

4. If you need physical ______ (力量), you should wear red clothes.

5. Only soft drink will be ______ (可获得的) at the party.