单项选择题

Every word processor we sell comes with a two year ______.

A．assurance
B．protection
C．security
D．guarantee
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单项选择题
After so many weeks without rain, the ground quickly ______ the little rain that fell last night.
A．absorbed
B．drained
C．digested
D．soaked
单项选择题
Aluminium is the most plentiful metal in the Earth's ______.
A．surface
B．crust
C．outside
D．cap
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