已知锐角∠α的顶点在原点，一条边在x轴上，另一边经过点P（3，-4），则sinα=（ ）。
With his work _____,John gladly accepted the invitation to dinner. [ ]
A. finished
B. fishing
C. having finished
D. was finished
“诗隐”是对哪位诗人的尊称？（）
A.白居易
B.陆游
C.孟浩然
D.贾岛
