Write the correct past form of the verbs in parentheses. 

1. Although the teacher _____________ very fast, I ___________ the lesson. (speak; understand)

2. The runner _____________ progresss when she ____________ her ankle. (make; hurt)

3. As soon as I __________ the finish line, I ___________ I could achieve my goal. (see; know)

4. The storm __________ while we __________ to leave. (begin; prepare)