1) ls there ——in the room? No,there is ___ 2） Is there ___water in the glass? No,there isn’t___

1) ls there ——in the room? No,there is ___ 2） Is there ___water in the glass? No,there isn’t___
第一题的选项：
A something ,anything B somebody ,nobody C anything,nothing D anybody,nobody
第二题的选项：
A some,someB any ,anyC some,anyD any,some
两题都选B 要详细解说!
谢谢
可不可以语法角度讲