Let's have ______.
问题描述：
Let's have ______.
A.the third try B.a third try C.third try
答
选B,A选项意思为“第三次尝试”
C选项缺少冠词the
B选项中,a third 在此是another的意思,全句意思是：让我们再试一次.
a+序数词=another.