补全对话，用适当的系动词填空。

　　A：Look at those flowers．They 　　1　　 really beautiful．

　　B：Yes,and they also 　　2　　 sweet．It seems that spring is coming．

　　A：The weather is 　　3　　 warmer and warmer,so the flowers come out now．

　　B：And trees 　　4　　 green,too．

　　A：We also 　　5　　 comfortable these days．So we can have a picnic outside．

　　B：　　6　　 great!

　　A：I'll make some cakes for you．

　　B：Thank you and I'm sure they will 　　7　　 delicious．

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