English, asked by tasleem786, 1 year ago

The teacher knew all _______ the problem.

Answers

Answered by enormous010
45
Hi friend,

# About

The teacher knew all about the problem..i hope it helps you


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Answered by Anonymous
12
Heya!
___________________________________

The answer is "about"

The teacher knew all "about" the problem.
______________________________________
Hope this helps you!
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