（） some of the suggestions prove of value to you as well？

单项选择题ProfessorTate（）abouthim.

A. heard the students to talk    
B. heard the talk by the students 
C. heard the students talking    
D. heard the students to talking

单项选择题Theyare（）amassproductionmovement.

A. firing        
B. launching 
C. introducing       
D. presenting