单词拼写。(每空1分，共10分)

小题1:All the men turned and _________(鞠躬)when Emperor passed.

小题2:She has such good ________(礼貌).

小题3:I opened a saving _________(账户)in the Central Bank of China.

小题4:After the tiring trip, his ________(力气)gave out.

小题5:Children are ________(好奇)about everything, so teachers and parents should satisfy their __________(好奇).

小题6:More than one thousand people were __________(淹没)in the sea after Titanic sank..

小题7:The ________(起源)of this custom is unknown.

小题8:You have to eat food with plenty of _____(纤维) that helps you _____(消化) better.