10. A: What (does this word / mean)?
B: I don't know. ＿ (I have never seen) it before. Look it up in the dictionary.
11. A: (Did you get) to the theater in time for the play last night?
B: No, we were late. By the time we got there, (it has already begun).
12. I went to John's room and ＿ ＿ (knocked) on the door, but there (was) no answer. Either (he had gone) out, or ＿＿ (he did not / want) to see anyone.
13. Angela asked me how to use the photocopier. (she had never / used) it before, so (she did not / know) what to do.
14. Mary ＿ (went) for a swim after work yesterday. (she / needed) some exercise because ＿ (she had been sitting) in an office all day in front of a computer.