Miss Wang, I went to your office at 11:45 yesterday morning ,but you weren’t in. — I _____with a student in the classroom at that time.

What time do you usually get up ________ Sunday?—I usually get up ________ 8:00.[ ]

Which of the two subjects do you like, art or music?—-______.They are really interesting.

______ happened to be no one in that house when the typhoon hit the area.

It is necessary_____ others when they are in trouble.[ ]