would you use a definite article here?

I think you can use either "a" or "the." If you use "the," it's a telegraphed way of saying "the lack of interaction that is the nature of online training."

(As a side note, I think you need more, though. A lack of interaction with the instructor? With your peers also taking the class? What type of interaction is lost? I'm not sure what you mean when you say that a lack of interaction is

Thank you.

Upon reading this post, I check my young friend's Collins/Cobuild Compact English Learner's Dictionary and in it, it had this definition of the word "lack."

Uncountable noun If there is a lack of something, there is not enough of it, or there is none at all.

My question is that why is there an article "a" when it, the word lack, is an uncount

Someone will have to help me think of how you can use lack as a noun without the accompanying "of" phrase and an article.

Uncountable nouns often take an article when you wish to differentiate them from other similar types of that noun.

I like beer. I like a beer from a good microbrewery. I like the beer that they serve on tap here.

I wish you happiness. I wish yo

Tricky one. Here's a sight that often helps me: http://www.learnenglishtoday.blogspot.com/

Thank you all.

Thank you.

Can you tell me why a person would use different types of articles in front of these nouns; the first noun (I think) is a variable noun like beer in your post and the second one is an uncountable noun.

1. Stay in an atttitude of faith

Stay in the attitude of faith.

2. (I got this partial sentence from a post here. I might not h

Believer
One thing that really baffles me is the issue of when it is allowed to use an indefinite article in front of uncountable nouns especially when the uncountable nouns have some what seem to be restrictive elements behind.

Ex,

a nature of human being (Why not, the nature of human being???) find 519 results in google.