这里的背景是介绍旅游时可以去什么地方，然后一一列举这些地方：time share apartment: accommodation which one owns, say, a 26th part of
and so has the right to stay there
for 2 weeks every year.这里and so是什么用法，后面has为什么没有主语？
...拟，if 从句用用一般过去）Luckily you were safe. What
if you’d had an acciden? 幸亏你是安全的。你当时要是出了事故怎么办？（对过去情况的虚拟，if 从句用过去完成时）That was very clever, but what if you had slipped? 那倒是挺聪明，不过要是...
...ls of the kidney, so that blood
flow diminishes, the kidney produces renin and discharges it into the blood.英语中不是不能只用逗号分隔独立句子吗，请问第三个分句前为什么没有连词（比如and）？或者是if、so that有什么特殊用法？谢谢！
Whittingham started his research into lithium batteries in the 1970s at a time when world oil prices were high and energy availability a big concern. and 后面的部分是不是少了个 was？
...s
are often a difficult age. 10 岁出头往往是个麻烦的年龄。She had been
smoking heavily since her teens. 她从十几岁起抽烟就抽得很凶了。要表示十一二岁的孩子，英语也有一个专门的单词，即 tweens。如：It is a movie
that appeals to tweens. 那是一部...
Rather,increased"experience"had caused the camputer's datebase to grow,giving it more date to process,which takes time.这里的increased是否用increasing更好？ giving的逻辑主语在哪里呢？which指代数据处理这件事，还是更多的数据？ 求指点。
This was later confirmed by a naval official at the Ministry of Defence after the Elkor had returned home.这个句子中at the Ministry of Defence 是作official的定语，还是做confirmed的地点状语，为什么？
On 8th July, 1947, an army officer reported a crash at the Rosewell base in New Mexico, USA. .... Within hours, people from the base were saying a UFO had crashed there. But later the same day,.......请问此处为什么要用过去进行时呢? 一般过去时可以吗? Thanks♪(･ω･)ﾉ