题目

完形填空；阅读下列短文，从文后各题所给的A、B、C、D四个选项中选出一个最佳答案。Dear Kate,   It is very   1__ that you are coming to our school so soon.  2   you arrive, let me introduce  3   you what our school life is like.  Our school is quite famous for its long history. It was created in the early 1920s. It is a good place where we can prepare ourselves well for the future. We have many wonderful teachers who are always ready to __4__help. __5___we pay a lot of attention to how well we do in lessons, achieving high scores is not the only reaso常温下，下列各组离子在指定溶液中能大量共存的是A．pH=1的溶液中：Mg2+、Na+、AlO2-、SO42-B．含有大量NO3-的溶液中：H+、Na+、Fe3+、Cl-C．c(OH-)/c(H+)=1012的溶液中：SO32-、NH4+、NO3-、K+D．含有大量MnO4-的溶液中：Ca2+、K+、Cl-、I-