—I am really struck by your spoken English. You speak so fluently. Have you been abroad?
—Yes. I ______ in London for two years.
A：have stayed
B：stayed
C：had stayed
D：have been staying
某剧团要编演一部反映南北朝时期我国少数民族与汉族友好关系的话剧，这部话剧可取材于（ ）
最终决定农业生产类型和规模的是（ ）
