The photo was taken ______ stood the famousBird’s Nest in Beijing during the Olympics

My best friend often shares things me and helps people trouble.

On account of the development of theeconomy, the environment is seriously polluted and we must ________ the emission of the carbon dioxide.[ ]

_____ hard work, he gained high achievements in that area.[ ]

______ on this report the English government decided to ask Captain James Cook to go and look forthis continent [ ]