单项选择题 Can't you keep your dog ______ coming into my yard It is always disturbing us.

单项选择题 The Englishman has a very good ear ______ music. You can ask him for some advice.

单项选择题 Last week, we had a meeting. I told the chairman that I couldn't attend it for I had something important to do, but he insisted ______ my being present.