用所给动词的正确形式填空

1. —Why didn't you watch the film yesterday?  

    —Because I              ______ (watch) it before.

2. You'd better              ______ (not play) on the road.

3. The rain has stopped. Why not ______ (put) away the raincoat?

4. The woman devoted all her time she had              ______ (help) others.

5. Before he knew the answer, Li Hua              ______ (give) the right answer already.

6. Deng Xiaoping played a very important role in ______ (develop) China.