单项选择题

______ in several foreign languages is needed for work as a traveler's guide.

A．Competence
B．Efficiency
C．Capacity
D．Proficiency
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单项选择题
The shop-assistant don't think there is anything wrong with his goods to ______ the consumer's complaint.
A．reclaim
B．incur
C．retrieve
D．recur
单项选择题
The young man asked his parents not to worry because he was full of ______ about his career.
A．optimism
B．motivation
C．assurance
D．resolution
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