单项选择题
According to the man, why is the buffalo population increasing in Yellowstone Park
单项选择题 What does the man want to talk to Ann about
单项选择题 —Would you like me to go to the dentist with you—No, you ______ with me.
单项选择题 Above all, they want to study a _______ question: Are humans actually aware of the world they live in
