单项选择题

In order to show his boss what a careful worker he was, he took ___________ trouble over the figures.

A．extensive
B．spare
C．extra
D．supreme
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单项选择题
It is said that the math teacher seems ___________ towards bright students.
A．partial
B．beneficial
C．preferable
D．liable
单项选择题
I think I was at school, ___________ I was staying with a friend during the vacation when 1 heard the news.
A．or else
B．and then
C．or so
D．even so
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