While many good and useful claims are being made, it is clear there is a long way to go in ensuring shoppers are adequately informed about the environmental impact of the products they buy.
分析主干：it is clear that...
句首的While 引导让步状语从句， 尽管 ......。it is clear......中，it 是形式主语，省略连接词that 的从句there is...才是句子的真正主语。in ensuring...是there be 句型的状语成分， 在确保......方面 。ensuring 后面接的是省略that 的宾语从句。
译文：虽然有许多好而有用的声明，但是，很明显，要确保购买者完全知晓所购产品对环境的影响还需要很长的时间。
2016年中考英语语法知识考点总结：时态二
中考英语重要短语的用法及区别：happen take place
中考英语重要短语的用法及区别：look see watch
中考英语重要短语的用法及区别：sometime some time
中考英语重要短语的用法及区别：have sb. do
中考英语重要短语的用法及区别：whether if
中考英语重要短语的用法及区别：must have to
2016年中考英语语法知识考点总结：There be句型与中考试题
中考英语重要短语的用法及区别：take care of look after
中考英语重要短语的用法及区别：besides except but
中考英语重要短语的用法及区别：ago before
中考英语重要短语的用法及区别：spend pay cost take
中考英语重要短语的用法及区别：across cross through
中考英语重要短语的用法及区别：because because of
中考英语重要短语的用法及区别：at on in
中考英语重要短语的用法及区别：either neither both
中考英语重要短语的用法及区别：borrow lend
中考英语重要短语用法及区别：say tell speak talk
中考英语重要短语的用法及区别：in front of in the front of
中考英语重要短语的用法及区别：arrive reach get to
中考英语重要短语的用法及区别：not … until until
中考英语重要短语用法及区别：join take part in join in
中考英语重要短语的用法及区别：agree with agree to
中考英语重要短语的用法及区别：also either too as well
九年级英语上册单元检测考试试卷Unit12（附答案）
2016年中考英语词组辨析：leave sw/ leave for sw
2016年中考英语词组辨析：lift/ raise
中考英语重要短语的用法及区别：as when while
中考英语重要短语的用法及区别：another other
中考英语重要短语的用法及区别：bring take fetch