单词拼写(共15小题, 每小题1分，满分15分)
小题1:Generally speaking, snow announces the a__________ of winter.
小题2:The students can’t enter the lab without the chemistry teacher’s a___________.
小题3: What can you do to c____________ to the poor?
小题4:The twins are s__________ to each other in appearance, but they have nothing in common in nature.
小题5:Charlie Chaplin, a famous actor, often appeared on the stage, s________ his stick in the air.
小题6:Unfortunately, he was d_________ in the last election.
小题7:The soldiers fought bravely to d________ against the enemies for their homeland.
小题8:The news that our team won spread t_________ the whole school.
小题9:In my opinion, parents should be s________ with their kids about table manners.
小题10:Children have a natural c_________ about the world around them.
小题11:When he came to life, he found himself lying on the bed, s_________ by many people.
小题12:Learning English as a second language can be a big c__________.
小题13:The pigeon r________ peace, which is the most important thing for human being.
小题14:Whenever he is late, he always has v_______ reasons for his being late.
小题15:Everyone was silent as he a__________ the winner of competition.