Densely populated cities generate sufficient orders over a small area that they can be aggregated into daily,or even more frequent,deliveries by van.that 在这里引导什么从句吗？是不是状语从句省略了so呢？
请问老师， seems to me 不该有个 that 连接词吗？It seems to me this highlights qulity issues in elementary school more than pre-K, and indicates longer-term success must connect pre-K with all the other issues related to educating a child.
Sri Lanka is in shock after more than 200 people were killed in a wave of bomb blasts hit churches and luxury hotels on Easter Sunday.请问这句话里面hit是不是用的有问题？
The above outlined literature works revealed that the potential of using OSA, as a base material in the production of geopolymer composites, was merely investigated, if none.
By 1970, according to a World Wildlife Fund report, only about 4500 tigers survived throughout the world-half of them in India.请问这里的throughout the world-half of them什么意思？作什么成分？
For much of the past year, President Bush campaigned to move Social Security to a saving-accountmodel, with retirees trading much or all of their guaranteed payments for payments depending on investment returns. 这里的trading如何翻译？
I：And haven’t you got a healthy husband and happy children?L：You must be joking. There’s never been the time … or the inclination.想请教曹老师这段对话的第二段分词been，如可理解在句中的语法？