Sentence:  Now the thing for us to do <WSD>is</WSD> to find ourselves a couple of those wonderful flowering currants such as the red Ribes sanguineum of our Pacific Northwest , or otherwise a good sloe tree , or perhaps some nice pussy willow in bloom , preferably one with male or staminate catkins . 
Meaning of the word marked with <WSD> tags:  be identical to; be someone or something