【2013广西贺州】 Our teacher often tells us _____ in the river. It’s dangerous.
Our classroom is cleaner than _______. We clean it every day.
Jack and I went on ________ two-day trip to Nanjing last weekend.
Which of the following underlined parts is different in pronunciation from others?
Which of the following words matches the sound /fi:l/?
--- I am going to Beijing next month. ---____________.