单项选择题

Automation threatens mankind with an increased number of ______ hours.

A．useless
B．active
C．complex
D．idle
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单项选择题
Because I find that hot summer weather ______ me and leaves me very tired, I try to leave the city every August and go to Maine.
A．irritates
B．bores
C．enervates
D．boils
单项选择题
The playwright was known not for his original ideas but for his ______ of ideas that had been propounded by others.
A．invention
B．reiteration
C．consideration
D．rejection
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