When the teacher heard us talking in class, he was very angry ____ us. [ ]

There’s _________800-metre-long road behind _________hospital.

What a hot day it is! —So it is. I think an umbrella can help you _______ the heat.

Can I help you? —I want to buy something _____ presents _____ my mother. [ ]

Mr Black is a hardworking engineer. He often stays up late _____ night. [ ]