题目

完形填空 Dear Mary， How are you and your parents？Did you__1__a good time last weekend? We had a day__2__from school this week.But I had a(n)__3__day.I got up early in the morning but the __4__was very bad.So I __5__to stay at home and help my mom do the housework.Then I went to the Gift Shop and bought __6__gifts.After that，I read a boring book and watched TV about Super Girls.After lunch，my parents wanted to go__7__a drive，so I went with them.However，that wasn't interesting，__8__.In the evening，my best friend__9__me to watch an interesting movie__10__sharks.But I 用金属钠制取过氧化钠的化学方程式是_______________________________制备Na2O，常用2NaNO2+6Na==4Na2O+N2↑。不用Na在氧气中燃烧的方法而采用此法的原因是：（1）__________________________（2）_____________________________