单项选择题
A．Teachers. B．Policeman. C．Farmers. D．Workers.
A．Fine, thank you. B．That’s all right. C．I’m afraid, it’s too weak. D．Don’t mention it.
A．He made 3 speeches every 6 days. B．He made 3 speeches in 6 days. C．He made 6 speeches in 3 days. D．He was going to start his fourth speech.