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From the chart we can see clearly that the average number of hours a student spends on Internet per week has increased from less than two hours in 1998 to nearly four hours in 2000, and then to 20 hours in 2004.

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From the chart, we can see clearly that in a big city in China, stateª²owned houses declined from 75% in 1990 to 60% in 1995 and then to 20% in 2000, while private houses rose from 25% to 40% and then to 80% during the same period.

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Ö÷¹Û£ºWe believe that three reasons can account for this phenomenon.

I believe that three reasons can account for this phenomenon.

In my mind, the reasons why the overseas students are on the rise are as follows.

Ö÷¹ÛÖ®±äÌ壨ʹÓòåÈëÓͻÏÔÖ÷Ó£ºThree reasons, we believe, can account for this phenomenon.

Three reasons, I believe, can account for this phenomenon.

Three reasons, I firmly believe, can account for this phenomenon.

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Ö÷¹ÛÖ®±äÌ壨ʹÓòåÈëÓ£ºThree reasons, in my mind, can account for this phenomenon.

¿Í¹Û£ºSeveral reasons can account for this phenomenon.

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