When organizing a document you must avoid clustering images together because the document could have a bad appearance in which everything seems to be disorganized, disrupted, etc. So the best way to place images would be at the top of the page or leaving white space around an image.
They couldn't hear me,.......? (Supply the correct question tag)
They couldn't hear me, <u>could </u><u>they?</u>
Here we used '<u>could they?'</u> as the question tag because couldn't which is negative has already been used in the question. Then, the question has the subject as 'they' which is plural, so 'they' is also used in the question tag.