How can I use the xsl:when to test a compound condition?

[Holly_vi]

Until now, all my conditions were simple ones, so I had no trouble using the xsl:choose and xsl:when element.
For example,

<xsl:choose>
  <xsl:when test="@item = 'fruit'">
    … DO SOMETHING
  </xsl:when>
  <xsl:otherwise>
    … DO SOMETHING ELSE
  </xsl:otherwise>
</xsl:choose>

But now I want to test a compound condition.
For example,
If attribute ‘item’ equals fruit, and attribute ‘item-num’ is greater than 1, then do something. Otherwise, do something else.

How do I do that?