有英语专业的朋友吗？请帮我翻译几句话吧，用start和begin，一句话翻译成四个句子，谢谢了

1.a)The rain started at two o'clock last night.
b)It started to rain at two o'clock last night.
c)The rain began at two o'clock last night.
d)It began to rain at two o'clock last night.
其他的用start和begin好像不对。题目肯定正确的吗？比如说第8题，完全用不到start或begin。

你的要求看不懂。