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Just as on smoking, voices now come from many quarters insisting that the science about global warming is incomplete, that its OK to keep pouring fumes into the air until we know for sure. 【析句】本句的主干是voices now come from many quarters，现在分词短语insisting 作伴随状语，后面是两个以that 引导的宾语从句， 其中第二个宾语从句还包含以until 引导的时间状语从句。 答案： 就同吸烟问题一样，来自许多领域的声音坚持认为有关全球变暖的科学研究还不完整，在我们确定此事之前向大气中继续排放废气是没问题的。 | 
