period ⅲ language points
课文缩写
mekong river begins 1.________ a glacier on a tibetan mountain.at first，the river is small and then the water begins to move 2.__________.it becomes 3.________ as it passes 4.__________ deep valleys，traveling 5.________ western yunnan province.sometimes the river 6.________ wide valleys and becomes a 7.______.we were both surprised to learn that half of the river is in china.after it leaves china and high altitudes，the mekong becomes 8.________，brown and warm.as it enters southeast asia，its pace slows.it makes wide bends or meanders 9.________ low valleys to the 10.________where rice grows.at last the river’s delta enters the south china sea.
1．two years ago she bought an expensive mountain bike and then she persuaded me to buy one.
两年前她买了一辆昂贵的山地自行车，然后她也说服我买了一辆。
[归纳]
one在此句中泛指“一辆山地车”，相当于a mountain bike。one可以替代前面刚提到的同类的人或物，其复数形式为ones。
[运用]
用one，ones，that，those，it填空
(1)i’ve always wanted a cd player and i’ve just saved enough money to buy ________.
(2)my shoes are similar to ________________ you had on yesterday.
(3)life today is much better than ________ in the old days.
(4)the days in summer are longer than ______ in winter.
(5)we have $500.will ________ be enough for a deposit?
2．now she is planning our schedule for the trip.
