—How did you like the concert last night ?—I enjoyed it very much, but the dancers _____ a better job．

---I think Miss Lin must be in the library. She said she would go there.---No, she __________be there. I have just been there.

Walking exercises ____ be boring at times, but on a clear sunny morning nothing could be better．

—When I first got to Harvard, my awkward English brought me great trouble.——Oh, dear, it _______a struggle for you to keep up with other students.

—Did you visit the museum last week? —No, we _____, but we spent too much time shopping.