Which factor is more responsible for black colour in

Choose the correct meaning of the idiom/phrase given below :

be down with

Fill in the blank given below using the correct idiom.

Mary's advice was _______________ and helped me avoid a major mistake.

Select the most appropriate meaning of the bold idiom in the given sentence.

Select the option that best conveys the meaning of the bold idiom in the sentence.

Select the most appropriate meaning of the following idiom.

Lean and mean

I'm sure you understand that we can't have a mere inspector still wet behind the ears running a case of this importance.

Choose the correct meaning of the following idiom:

Barking up the wrong tree 

It is the result of feeling blue for so long that has now started affecting his physical health also.

"After trying everything to fix the computer, John was at his wits' end and didn’t know what to do next."