单项选择题

Although we have badly fouled our planetary next, ______, it is by no means clear that our profligacy has as yet greatly changed the incidence of cancer.

A．with good will
B．at a rapid pace
C．with woeful consequences
D．at a special period
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单项选择题
It is these skills that ______ are being neglected in the arguments over ambiguity and the setting of guidelines for sound research practices.
A．do I believe
B．I believe
C．I shall think
D．I will think
单项选择题
Second, interactivity: readers can adjust how they look at web pages, they can respond immediately to what they are reading, and we can quickly react to ______.
A．a response
B．no response
C．this response
D．that response
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