1 . Talented in both medicine and sports, Robin ________(tear) between becoming a doctor and an athlete when he graduated. (所给词的适当形式填空)

2 . Slowly, and with the camera still held to my eye, I turned... and __________ (freeze). (所给词的适当形式填空)

3 . The other day, we brought along pieces of old bread and__________(feed) the birds. (所给词的适当形式填空)

4 . Had I known the party was so boring, I wouldn’t have come. It __________ (prove) a failure. (所给词的适当形式填空)

5 . It suddenly ________ (occur) to him that he had an important meeting to attend the next morning. (所给词的适当形式填空)