(09海南、宁夏卷)31. The computer was used in teaching. As a result, not only , but students became more interested in the lessons.
Professor Williams keeps telling his students that the future ________to the well-educated.
The water ________ cool when I jumped into the pool for morning exercise.
—What's that noise? —Oh,I forgot to tell you.The new machine ________.
—Why does the lake smell terrible? —Because large quantities of water ________.
His sister left home in 1998,and ________ since.