单项选择题

（　　）the wealth of the country increases,more waste will be produced.

A.With
B.As
C.For
D.Since
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单项选择题
Of interest is also the question whether, and if so, how a technology marked by many as revolutionary can impact on established leaning and teaching in a context which appears to be______to change.
A.hesitant
B.reluctant
C.resistant
D.persistent
单项选择题
______Newton started to do experiments， he forgot about the time.
A.If
B.As
C.Once
D.When
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