21.   Keenan certainly bided his time before coming forward to lodge his complaints.

22.   Quinn had passed it many times before, and he was familiar with the winos and vagabonds who hung around the place.

23.   She was self-assured and spoke without notes, having done this so many times before.

24.   The city spread out below her looked so calm, almost as calm as she had felt such a little time before.

25.   The Commissioner had, according to Namaliu, been under observation for some time before acting on impulse and alone.

26.   The men had been under surveillance by customs officers for some time before their arrest.

27.   The plane circled the airport several times before landing.

28.   The plane circled the runway several times before landing.

29.   The whole thing had to be repeated three or four times before Sandison got the gist.

30.   The woman upstairs shouted down at us and threatened to call the police, as she had done many times before.