Ritha realised that she had been ---------in her duties ;had she been more ---------the disaster might will have been avoided

Many of the truble and deficiencies in other wise thriving foregin enterprises are ----------ignored or diminished by the auther of the article in order to ----------the way in which other business might attempt to imitate them

Many ecologists are concerned that the 'greenhouse effect' is cahnginkg many of the Earths---------weather pattern s into --------system unable to be accurately forecast by those who study them .

To flog a dead horse

Hand in glove

In the following question choose the altranative which best hexpresses the meaning of the idiom /phrase

A hard nut to crack