单词拼写。请认真阅读下面短文，并根据各题所给首字母的提示，写出一个合适的英语单词完整、正确的形式，使短文通顺。
Reading books is a good hobby for all kinds of reasons.
First, reading books is f____ You can always keep yourself interested and help you to have an enjoyable time if you like reading.It is a relaxing hobby too.You can really become lost in a book.
Next, you can read a book a____ : in a car, in a waiting-room, on a plane, in bed — even in the bath.All you n____ is a book! Reading is a convenient hobby as it is easy to stop and then s____ again.
A____ good reason for reading books is that it is useful.If you read as a hobby you will get better and better at it.This m____ that you will read faster and will become better at understanding what you read.As your reading improves, you will probably find your schoolwork becomes much e____ .Many school subjects depend on(依靠) good reading and, as you read, you l____more and more.
Good readers are most likely to be good w____, too.They are usually good at spelling as well, and have more things to write about.Reading books is a wonderful hobby, one of the best.
W____ other hobby could be, more useful, or more enjoyable?
)＝2c(K＋)＝2c(Cl－)，则溶质可能是 ( )
