单项选择题

The ______ problem of bring a space-ship back from the moon has been solved.

A．technical
B．technological
C．technique
D．technology
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单项选择题
As electric lines were destroyed by the storm, they were forced to ______ light for several days.
A．go over
B．go in for
C．go without
D．go out
单项选择题
The concept of ______ grouping people with similar interests and abilities was very popular among educators.
A．implement
B．homogeneous
C．integrated
D．perfection
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