单选题 She began to __________ something, but stopped when she heard the teacher speaking.

【正确答案】 C

【答案解析】这三个词都有“说”的意思。say后面接所说的内容，say sth．。tell是“告诉”，“说出”。tell sb．或tell sb sth．。speak是“发言”、“讲话”、“面谈”。speak to sb．about sth．与某人谈论某事。