The harm the modern farming methods have done________ the countryside is considerable.[ ]

accidents, _________ forty-five people losttheir lives, have renewed concerns over the safety of overnight buses.

What do you often do_______ classes to relax yourselves — We often do eye exercises, listen to music or do some running around the school.

Before joining the Department of Defense, MrPanetta ______ as director of the CIA from February 2009 to June 2011.[ ]

We have run _______ ifshe had worn the sports-shoes that day.