The rise of oil prices made scientists search for new energy resources ______ oil.
The Browns had the house painted brown when they moved in,____________?
Some companies have introduced flexible working time with less emphasis on pressure ______.
When I try to understand __________that prevents so many Americans from being as happy as one might expect, it seems that there are two causes.
___________, I have never seen anyone who’s as capable as you.
All of us were so excited at the news ________we’re going abroad for holidays_________we jumped with joy.