Mr. Liu born in a poor family, _____a lot of suffering when still a child.

 I had planned to invite Tom to the party to increase the atmosphere, but it turned out that his arrival ____ the atmosphere.

In 1492，Columbus ________ on one of the Bahama islands，but he mistook it for an island off India.

 The three of us ________ around Europe for about a month last summer.(2012·天津)

I often have a hard time _______myself from my bed or even rolling over to write everything have dreamt in my notebook.