单项选择题

Since the situation is changing, let's take some ______ measures to deal with it.

A．available
B．considerable
C．changeable
D．flexible
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单项选择题
Professor Taylor's talk has indicated that science has a very strong ______ on the everyday life of none-scientists as well as scientists.
A．motivation
B．perspective
C．impression
D．impact
单项选择题
Conditions everywhere have been seriously worsened, ______ the postwar rise in prices.
A．as to
B．in relation to
C．owing to
D．with regard to
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