Question

— Do you know ______ girl who is standing under ____ tree?— Of course! She is Lucy, my classmat.

— Do you know ______ girl who is standing under ____ tree?— Of course! She is Lucy, my classmates. A．the, the B．a, a C．a, / D．/, the

Answer 1

A

冠词用法。the用于特指某人（物），本句意思就是指树下站着的这个女孩，girl, tree都是特指，故选择A。