On the evening of October 7, Li Feng was watching TV while his mother was ____ b      cooking supper in the kitchen. ____ S       the telephone rang. Li Feng ____ q     picked it up to____ a        the call. It was from a good friend of his____ m     . She wanted to say “Happy Birthday” to his mother. "Today is Mother's birthday, but I have already____       f_____all about it. Mother gives me a lot of____ l      and care while I didn't care for her____ e    . From now on, I must always____ r     this, ____ s     my love to her and care for her enough,” Li Feng thought to himself, feeling a little ashamed(惭愧的).

+4.05读作____，负三点二写作____。

我国北方最大的盐场是____ ．

下列各组四字词语中，没有错别字的一组是（     ）

水是最常见的物质，以下与水有关的说法正确的是（　　）