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short of 与a lack of 怎么区分

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short of 与a lack of 怎么区分
Because of ____ knowledge about how it gets transmitted ,there are a great many people who have contracted HIV in China .
A a lack of B short of
,我不理解 ,请帮看看
short of 与a lack of 怎么区分
这个题主要跟词性有关,because of 后面必须接名词或名词性短语,a lack of刚好就是名词性的,而short是形容词,此题中不能选short of.如果硬要用short有关的词的话,就可以说because of a shortage of sth.
a lack of 与short of 怎么区分 请问short of 与a lack of 怎么区分 short of 与a lack of 怎么区分 a lack of a short of的区别 be lack of与 be short of区别?请举例说明 be short of 与be lack of 的区别? be short of 等于lack a lack of a lack of 与 no lack of 的区别那么补充一句：lack in 怎么用呢？ lack与lack of是怎么用的 lack是a lack of还是lack of 可数么? 提问?区分:1.a lack of .lack of2.be different to.be different fro as倒装句中 short of 和lack of 区别