Question

9. With        his lecture about the endangered animals,the professor has been preparing for it all the day. (attend)

因为许多学生要来听关于濒危动物的报告，这位教授一整天都在做准备。

Answer 1

9. many students to attend考査with弓起的独立结构。因动作将发生，应用不定式作补足成分。