_____ we go to the McDonald’s I’m sick of the foodthere!

People say that the documentary will be covered . It brings dinosaurs _____ on screen.

What else did you do this morning besides doing the shopping?—Two hours__________washing the windows and the floor.

－Are you going to take the job?－Certainly, though the salary is not so good，you know

51 — Who is at the _____ of all thistrouble— I don’t know