Where did you first meet yourboyfriend——It was in the department store ______he worked.

Hi, Johnson, any idea where Susan is—It is class time, so she __________ in the classroom now.

Medical education and engineering education belong to totally different categories and are always on ________ tracks, it is difficult to develop cross-subjects between them.

There at the door stood a girl about the same height__________.

Have you finished drawing your picture _____, Tom—Certainly, Mum. I have drawn it _ _. Can I go out for a walk now