John hasn’t come yet, I don’t know _____.

下列各句中，加下划线的熟语使用不恰当的一句是（ ）

We can use MSN to talk with each other on the Internet.—Really Will you please show me ________ it

lly, after I tell my brother what todo, he ____ go and do the opposite

Unforgettable ______ her pale blue eyes that flashed like diamonds and thin lips wore a pleasant smile