请根据首字母及中文提示，用Book3Units4-5学过的单词或短语的正确形式填空。（51—53是短语，54—60是单词）
【小题1】________既然) you want to improve your oral English, you should speak English every day.
【小题2】I ______(感到振奋) immediately and floated weightlessly around in our spaceship cabin watching the earth become smaller and the moon larger.
【小题3】She is proud that both of her children ______(有…天赋) music.
【小题4】It is ______(有害的) to your eyes to read books in the bus.
【小题5】There ______(存在) a temple on the hill in the past.
【小题6】People say it is Canada’s most beautiful city, ______(包围) by mountains and the Pacific Ocean.
【小题7】At school, they had learned that most Canadians live w______(在…之内) a few hundred kilometers of the USA border.
【小题8】Once the flight is ______(证实), you can pay for it.
【小题9】He is a boy who always ______(使印象深刻) me with his honesty.
【小题10】Ottawa is ______(大约) hour hundred kilometers northeast of Toronto, so it would take too long.