Question

— 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。