Some very common things such as    to the sun for a long time will do harm to people's skin and even cause skin cancer

— There is a story here in the paper about a 110-year-old man.— My goodness! I can’t imagine________that old.

______ down on the ground, he struggled to his feet and held up his head, _______his enemy.

Television lets us see history in the making. We can watch sports, political debates, trials and even wars ________．

into the university was a great pleasure for his whole family.