动词过去式规则与不规则变化 — 英语填空题
题目
用所给动词的过去式填空。Yesterday evening, Lily ___ (write) a short story about a famous scientist. In the story, the scientist ___ (think) carefully for many years before he finally ___ (find) the answer. When people ___ (ask) him about success, he said he never ___ (stop) trying.