单项选择题

The ______ of seawater into drinking water is a complicated problem.

A．conversion
B．conjecture
C．concession
D．contraction
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单项选择题
It was felt that he lacked the ______ to pursue a difficult task to the very end.
A．engagement
B．persuasion
C．commitment
D．preservation
单项选择题
She always ________ the smell of fresh bread with her grandmother, who loved baking.
A．associated
B．remembered
C．exemplified
D．attributed
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