This ( )of keys isn't this.补充

This ( )of keys isn't this.补充 This ( )of keys isn't this.补充 That is her watchHow do you spell it?Is this your computer?No,it isn's a set of keys. You use this set of keys for No,it isn't a set of keys.的中文意思是什么? Are these your a set of keys?这个句子对吗,可以这样问吗,还有就是Is this her book?的回答为什么只能是No,it isn't.而不能是No,it is not. this,yours,keys,set,is,of,the,lost,in,and,found,case（?）连词成句 She d()her keys under the tree this morning.Lots of parents want s（） children. I lost a set of keys.然后是用 Is this yours?还是Are these yours? This is a set( )keys用介词in,on,under,of,for We can use _____ keys for ______.A.this,type B.this piece of ,type C.this list of,typing D.this set of,typing 是where is a set of keys 还是where are 回答是It‘s 还是They're是Is this a set of keys 还是 Are they a set of keys this isn't very interesting for most of us.翻译 This pair of shoes isn tgood,but that pair is___better 翻译this isn't for the faint of heart this is换he/she is,a set of keys换keys可以吗?为什么a set of keys是复数,下面一句却是is this your set of keys.is不是单数用的吗?什么情况下用at?什么情况下要换第三人称形式?什么单词前面要加the?什么情况 THE KEYS OF MARINUS怎么样 This is my dictionary.(改为一般疑问句 set to that a of is keys room her （连词成句）