【跪求】lack of 和 a lack of的用法,如题,

【跪求】lack of 和 a lack of的用法,如题, lack of和a lack of的区别? lack of 和 a lack of的区别 lack of 和lack for 的区别? lack 和lack of 有什么区别? lack 和lack of可以混用? Lack anything,lack of a lack of 和lack of 有什么区别?这俩个词组中lack都是名词,但是有什么区别呢? lack的用法请问a lack of、be lacking in和lack for用法上有什么区别? lack of lack of lack of lack of sth 和 a lack of 的区别最好用例句说明一下 be lack of和be lack in区别 lack 的用法a lack of、be lacking in和lack for用法上有什么区别吗?尤其是lack of 和lack in 用法上的区别?最好给例句^^^ a kind of skill和lack of creativity lack作名词是be a lack of 还是be lack of 4.This item was not explained __ time.A. for lack B. lack C. for lack of D. lack of