单项选择题

The money I got from teaching on the side was a useful ______ to my ordinary income.

A．profit
B．supplement
C．subsidy
D．replacement
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单项选择题
The new aircraft will be ______ to a test of temperatures of -65 and 120.
A．suspended
B．suppressed
C．summoned
D．subjected
单项选择题
The Labor Party's electoral strategy, based on an ______ with other smaller parties, has proved successful.
A．acquaintance
B．integration
C．alliance
D．intimacy
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