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  3. Do you remember all those years when scientists argued that smoking would kill us but the doubters insisted that we didn’t know

Do you remember all those years when scientists argued that smoking would kill us but the doubters insisted that we didn’t know

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问题    Do you remember all those years when scientists argued
that smoking would kill us but the doubters insisted that
we didn’t know for a sure? That the evidence was inconclusive,               【M1】 _______.
the science uncertain? That the antismoking lobby was out to destroy our way of life
and the government should stay out of the way? Lots of Americans bought that nonsense,
but over three decades, some 10 million smokers went to                      【M2】 _______.
early graves. There are upsetting parallels today, as
scientists in one wave and another try to awaken us                          【M3】 _______.
at the growing threat of global warming. The latest was a                    【M4】 _______.
panel from the National Academy of Sciences, enlisted by the White House, to tell us that
the Earth’s atmosphere is definitely warming and that the problem is largely man-made.
The clear message is what we should get moving to protect                    【M5】 _______.
ourselves. The president of the National Academy, Bruce
Alberts, added this key point in the preface of the panel’s                  【M6】 _______.
report "Science never has all the answers but science
does provide us for the best available guide to the future,                  【M7】 _______.
and it is critical that our nation and the world base
important policies over the best judgments that science                      【M8】 _______.
can provide concerning the future consequences of present actions. "Just as on smoking
voices now come from many quarters insisting that the science about
global warming is not incomplete, that it’s OK to keep pouring               【M9】 _______.
fumes into the air until we know for sure. This is a dangerous game: by the 100 percent of the evidence is in, it may be too early. With the risks obvious and growing,a    【M10】_______.
prudent people would take out an insurance policy now.
【M5】
选项
答案what改成that
解析 系动词is后跟的表语从句we should get moving to protect ourselves是对clear message的内容进行解释，引导词在从句中不做任何成分，因此把what改为that。
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