单项选择题

These pieces of wood have _______ and become useless because of too much rainfall.

A．disappeared
B．decayed
C．altered
D．transformed
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单项选择题
Mother hasn't much money and it is only by good ________ that she is able to buy all we need.
A．arrangement
B．rule
C．management
D．government
单项选择题
Your failure in the final examination is due to the fact that you didn't _______ enough importance to your English.
A．attend
B．attack
C．attach
D．obtain
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