The girl can’t take her dog              .

---Mr. Bill always makes his class very lively and interesting. --- You are right. No one teaches ____.

He enjoys a cup of coffee in the afternoon sometimes, but ______ he drinks tea.

 I enjoy my new life here. But I still miss my old friends from time to time. Here the underlined part means 　　　.

—Have you ___________ been to Beijing? —Yes. But only once.