<P>There is <U>a</U> book on the desk.&nbsp;&nbsp; (提问)</P>
<P>&nbsp;</P>
<P>How many books is there on the desk?</P>
<P>&nbsp;</P>
<P>&nbsp;</P>
<P>How many books are there on the desk?</P>
<P>是用哪个？</P>

How many books are there on the desk?是对的

楼上的是对的，在不知道数量的情况下去问，一般用复数，当然就用ARE了

谢谢 ！！！！！！！！！！！！！！！！

How many books are there on the desk？

How many books are there on the desk?