第四部分写作（共两节，满分20分）第一节短文改错（共10小题，满分5分）In order to go diving, you need some equipments. Fir

第四部分写作（共两节，满分20分）
第一节短文改错（共10小题，满分5分）
In order to go diving, you need some equipments.
First divers carry their backs a metal bottle, which
is filled of water. There’s enough air in it to
last about 40 minutes. Next, divers carry heavy metal
weights in a belt around its bodies. 
With these heavy weights they would float to the
surface.  You see, there are a lot of air in their
air bottles, and this will bring them up to the  
surface if they didn’t have any more weights. 
Mostly divers don’t go very deep.
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76.equipment       77. carry后加on          78. of改为 with       79..正确