请教几个英语改错题
问题描述：
请教几个英语改错题
1.Daring is concerned not only with the production of milk,but with the manufacture of milk products such as butter and cheese.
2.The bell signaling the end of the first period rang loud,interrupting the professor's closing comments.
请问这两个句子分别错在哪?
答
1 but 应为but also
2 In the end of the first period ,The signaling bell rang loud, interrupting the professor's closing