【2013甘肃兰州】Lily doesn’t know ________ she and her friends can do to help the little boy ________ parents have left their hometown for making money.
--What's up? --I can't stand the noise outside. It's nearly________ me mad.
He doesn't tell me when he_______ . I'll telephone you as soon as he______.
——Who is knocking at the door?——It ______ Mr. Black, because he_______Washington.
In winter people usually keep flowers in their houses to ___them from the cold.
—— I feel tired and sleepy. ——Why not _______?