It’s necessary to have some____ knowledge for this job.

— He has been playing computer games these weeks. — It’s no __________ he didn’t do well in the test this time.

 There existed an obvious________ between the accounts of the witnesses, so a judgment was not announced in court.

You can't see the___________ now for they are having a meeting at the moment.

I dropped ________ and it wetted the carpet in the sitting room．