题目

Having finished her project, she was invited by the school ______to the new students. A. speaking   B. having spoken   C. to speak  D. to have spoken 答案： C下列关于美国的说法错误的是：A.移民国家B.农业特点是专门化和现代化C.世界上最发达的工业国家D.只有48个州