同义句转换。

1. The dictionary cost me fifty yuan.

     I _______ the dictionary _______ fifty yuan.

2. She has made up her mind that she won't do that again.

    She has _______ _______ to do that again.

3. He didn't catch the last bus, so he had to go back on foot. 

    He had to walk back _______ he _______ the last bus.

4. The runner fell behind the others though he did his best. 

    The runner did his best, _______ he still _______ to keep up with the others.

5. I didn't go there for the outing with them because l was ill.

    My illness _______ me _______ them in the outing.