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Exe4. Complete the table with the information from the text.
Life in space
Reason
When they drop something
It ___________
____________.
There is ___
_________ in space
floats away in the air
no gravity
While-reading
float v. 漂动，浮动
gravity n.
重力，地球引力
Life in space
Reason
When they drink
They use ____________.
This keeps the drink ___________.
When they sleep
They ________
_____________
_____________.
They don’t want to _____