It will not be long _____man can harness the solar energy and make it serve mankind

d you like to join us in the barbecue this Friday afternoon —Sorry, _______.

The film 2014 has filled some people with ________ fear that ________ man will meet terminal disasters in 2014.

Lady Gaga has put off her concerts because of the difficulties ____ by the ongoing strikes [ ]

Why not look up the new word in a dictionary _____ you don’t know it ?